I don’t get it 😫

My ex and I split the end of last year we went our own ways but I wasn’t over him yet.. we stayed in touch and in feb he told me he had a kid otw... I was broken because we’ve been trying for over a year and as soon as we split he gets someone pregnant. I guess it wasn’t meant for us.. but I did see him a few times and we had sex... it ended pretty quick and at this point we were just fuck buddies but I’ve been trying to move on so I met someone new and it was cool at first but I’m still unsure... I’ve stopped texting my ex after the last time we fucked because as I said I’m trying to move on but he keeps reaching out even if I don’t respond he’s trying to meet up with me and it just makes me wonder why... is the sex really worth it? Where is your bm? Should I talk to him about this or just let things be