I probably should add this to my OP.
There is one (albeit older) guy I talk to regularly. We met years ago online, spoke for a long time and recently reconnected and speak over video calls. There is a serious prospect that we could meet soon (he lives in another country).
He used to always have time to text me whenever during the day and talk to me. We spoke about any subject under the sun. Well, lately he has kept making excuses and never seems to have time to speak to me. He insists I am the only one in his life and seems really genuine, and says he will come as soon as possible, but every time he moves the time of our speaking and says he will be back at the time he knows I go to bed (I have trouble sleeping). (Yes, it's a romantic tinged relationship.)

Next. There is another friend who recently had a birthday. We used to be really close and friendly for about 2 years. She never replied when I asked if she managed to celebrate and how her sports team (she is a judge at a competition) was doing. She hasn't called me in a few months, and even before it always seemed to be me who called her.

I described events with the other 3 girls in my OP. Basically, all these people (frankly I hardly know anyone else) seem to be avoiding me if possible, and I definitely feel like I can't just be upfront and ask one of them if there is a deeper problem. It's just that it's a pattern, and painful for me who craves a close connection. Like I said, with many of above mentioned, we used to be close. It's really sad too that I feel I can't honestly find anything out with them, that they wouldn't even tell me honestly. And I am so worried now. : ( It feels like no one wants to be with me. It can't be that they all have personal issues.
Mum is of no help at all (I live at home), she honestly never gives any advice as she says she doesn't know how, but problems with friends have been a pattern throughout my life and no one could ever help me. I've been to therapists, described my issues, and they too mainly listened or said nothing seems to be wrong with me.

So please help, and give it to me straight. : ( Wish the forums could be personal.