Relationship

So I was dating this guy back in November and in late March we had sex after that he told me he needed his space. I liked him a lot but I kinda accepted it and wrote him off . I started dating a new guy in late February we are taking it slow and I like him a lot. BUT then the old guy I was dating back in November( let’s refer to him as R) came back he told me he loved me and he wants to make it work he said he was just going through alot of stuff and he was upset because he was in the process of getting another apartment, and was frustrated that it didn’t work out. Idk what to do sort of me feels like fuck you you and another part feels like maybe he deserves a second chance. BUT what about the guy I’m dating now, I feel like a piece of shit for even entertaining R. WhT do I do?