Hello. Today I want to share with you something about my current dilemma in love, and hope you can help out. If it's long, I'm just trying to describe it, sorry.

So, I used to speak to a guy online (from about 13 to 17, and then from 18 to 19) who always claimed he was two years older than me. We met on some chat site which is now defunct. We had a full blown "internet relationship" going, as he some time after first speaking to me claimed he loved me, and was just generally extremely nice, kind and generous with compliments and it all felt unexpectedly genuine. So I felt I must mean something to him, I was young too and it meant a lot. We spoke daily in the evenings for more than 2 hours sometimes, and always had something interesting to talk about. He never had a picture up like me though. Whenever I wanted to meet him, he wanted to too but would always in the end find an excuse. He was from the UK and I'm from Europe, so I had to go holiday there and always felt let down. But our "relationship" was very intense, and when I was 17 we started regularly speaking on the phone. We spoke a lot especially when I went to university there, and he didn't meet me, but I was so taken with the r-ship. and his niceness I always forgave him. Well, I was on phone to him once I had the summer break back once home (at 19), and he admitted he was much older. He was apparently in tears. I asked if he had an attraction to young people, and he said no. (It also would've been hard to do much speaking with someone else as we spoke all evenings, and he was employed.) I was also angry for all the lies and deceit, and he never met me either and thought he wouldn't want to, so I broke it off. We didn't speak for 8 years altogether, and he occasionally would email me (saying he hopes my life is going well, and he would always love me and respect me). I once tried talking online again, but felt he again wasn't serious about meeting up (I was still a bit attached and v. curious), maybe sth. was still holding him back, and so I didn't speak to him again. I even once requested he stop emailing me, so he said "ok" and respected my wish.

2nd part. In 2014, I was on holiday in Bosnia, where my relatives live, for the first time. There I met their neighbour, D, and we sort of had sth. going, we liked each other a lot, it was a whirlwind romance, we didn't sleep together but we kissed and cuddled and he seemed to like me a lot too, would get jealous if I went with someone else, etc. He was about 10 years older than me but he looked and seemed young. Well, I then left after summer to again study abroad, and he wasn't on any social sites. So we only got back in touch once I visited (two times after the 1st time).
Well, in 2019 we found each other on FB (I was then living in home country again) and started messaging, but things got off to a slow start and I also wasn't on much due to health issues. Well, recently in Nov 2020 we started regularly messaging again, he sent me some romantic msgs. and I asked him if he was serious about me and he said he did like me. Since, we have been messaging on a site similar to Skype every day without fail. He seems very serious, talks about our future r-ship. and says he loves me. (We couldn't meet yet as he is working daily, due to severe corona restrictions too.) Now that corona is "waning" with less restrictions, he said he wants to come to me and Mum's house for a week in August, go with me to the beach, spend time etc. So things are getting or could get serious.

Now, 3rd part. Don't call me crazy but in April, I suddenly developed a strong wish to reconnect with P, the guy from 1st part. I just wanted to clear things up and see if maybe we could stay in touch as friends as our chats were always so enjoyable. I fully expected he was still not serious about meeting though, so probably it wouldn't work. I found him on FB and messaged, and he was taken aback in a good way. He could hardly let me go when I had to leave and we spoke regularly for a few days. I said I wanted to see him on cam, and to my surprise I did see him, and was positively surprised and I thought he looked good for his age. Now, this guy is 51 and I am almost 28. Again, don't call me crazy, but we hit it off immediately, it felt like things had changed for the better, he was also happy we reconnected. But well, he says even though he shouldn't, he "still loves me and misses me", and keeps talking that I would make his life perfect if I were willing to be in his life. We talk on video calls and he looks and sounds totally genuine. He even says he'd be willing to change his life in order to have me in his life. He has two kids, one is slightly older than me and still lives at home, and each have kids of their own. He even says he'd give me kids if I wanted them, although he's older, and he would take care of me and look after me, etc. Not just to impress me. I just really really like him. But at the same time, I worry about him being 70 in 20 years, dying before me, and many other things. I said I'd visit him where he lives, he was very up for it, he even told his children basics about me, but that'd be once corona is over.
And the other thing that is weighing on my mind is the other guy, who I also genuinely like even though we don't speak on video calls, and I am just confused and don't want to lose or hurt either, esp. not as friends.

What are your thoughts? What would you advise me, please? I think I get along well with both. Should I even let D come over in August, should I tell him about the other guy (I think that would kill things btw. us)? Or should I shoot the r-ship. in the foot before he gets attached? I am soooo confused. Please don't just say "P is much too old and it will never work" as that is what my friends think, but I also think true love can surpass that and you can deal with difficulties. He just seems so frank and genuine.

Please help, and thank you so much for taking the time to read this. I'm very interested in your thoughts.