Relationship advice?

I was in a relationship for 6 years, although half way into our relationship he moved away so it was long distance. I'm 21 now and when we both started college he cheated on me. (Mind you I took a trip down there for the holiday and that's how I found out he was cheating) I took him back but I found out that he was actually dating the girl he cheated on me with. So we ended things and it's been about two years since we haven't been together. I lost my virginity to him but when we broke up I went thru that hoe phase and I ended up sleeping w about 7 guys after him. Now here comes this guy that's about three years older than me and has a new born. I'm so used to being alone, I enjoy my own company, i don't want to commit, I suck at texting, im not consistent with any guy, I don't catch feelings quick, I just focus a lot on myself , my wants and needs. But this guy comes into my life w a kid but he's so consistent w me and I take days to text back but he's so understandable. But I don't know how I know if I'm ready for a serious relationship? How do I know he still isn't fucking his baby momma or anyone else? Ps (when I found out my ex cheated I was so fucking depressed and til this day he still hits me up talk bout i love and miss you blah blah. But I also go to him when I need life advice,). Idk if I should just stay away from relationships and just focus on myself? 🙃