I need big sister advice. TIA!

Me and this guy have a really deep relationship now (not dating) but I deep down believe its not good for me but its soooo hard to let go. We talk DAILY I mean from morning to night, mornings we call each other on our way to work, during the day we txt literally all day & when we get off from work again we call each other. The dependency we have on each other its sooo hard to let go of, I have tried NUMEROUS times. The reason why I say its not good for me is because it feels like almost every weekend he goes and spends time with his kids BUT also the mom of the kids. They have always been on & off but it basically became “official” back in August but they have been on & off since June. I know im dumb, I know I need self love I know & this is why its hard for me to just let it go & this is where I say I need advice. Even though he swears he’s done with her & that if he wanted to get back with her then he would’ve long time ago but still hangs out with the kids & her makes me confused like idk why he does it, I have a hard time understanding how he feels. She knows about me, she knows he is trying to have a “relationship” with me, but I also feel like this isn’t a way he should go about it if he really wants a serious relationship with me. Also, im not sure if its bad or wrong for me to think this way, but another reason why I second guess myself is because he is 34 & has yet to have a place of his own. He was living in an apartment with her prior to breaking up with her, it makes me feel like he is a guy that will never want to succeed in life, or at least be the team im looking for in that sense. Is it possible that by that age he isn’t serious about building anything with anyone? Im just rating at this point. Im 28 btw.