I've been through something similar and it's not worth it. I'd rather go through no contact and try to deal with my feelings instead of going to a guy who will keep hurting me. If I keep going to this guy, this cycle of pain/hurt will just keep on going. We had an on/off relationship but he would title us a FWB. It was a complete mess. He got a new gf and I told him from the beginning, I need to be ok on my own and we can be friends in the near future then weeks later, he contacted. He's been doing this contacting me nearly every day, then contacting me once a week or just not at all. He once said to me he used me for sexting so he can cope with the stress of the relationship, that hurt that hell. It hurts like hell but if you're truly determined to use all your energy to question your thoughts and do things you love, eventually over time you will heal. 5 years ago I would be crying my eyes out and now I am a lot peaceful. It hurts a bit but I can cope with the pain and I can cope being on my own. Block him for your sanity, it's seriously not worth it. He's shown that he only cares about sex. You may fall down but at least have the strength and courage to get up again. You may have been involved with someone emotionally unavailable or a narcissist, that makes it a lot more harder to get over it. I wish you all the best.