Idk what to do

I left my boyfriend, 2 weeks ago-ish or more. I got back together with him 4 days ago. I came to his town, in his house. He’s had our 5 month old, as it was his turn with him when I came back.

It feels different to me, but I’m trying but another part of me wants to fly back home. I’m scared to make the wrong decision as well, because once I leave this is it for him. He won’t take me back. I left because he cheated while I was pregnant & saw/talked to the girl behind my back during my pregnancy with our son.

He wants to make this work, he’s been loving me up & doing a lot for me the last few days. He’s telling me to be patient. But I’ve been thru so much emotionally these last 2-3 months.

In July, i found out he seen the girl behind my back. Took her out. August I found out he fucked her & then a few days after that my grandpa passed away. So it’s been a lot of emotions. He knew I got cheated on in my pregnancy in the past as well (I have another son from a previous relationship) so for him to do it to me too is crazy.

He’s fucked for telling me too that “now he knows to get married right away in my next relationship” because we were supposed to get married. We were engaged for 6 months. Idk why he’d say that shit to me lol. Idk, I’m scared to make the wrong decision on leaving then he moves on & gets “married” & spoils her. Because he is extremely financially stable, he bought us 2 trucks. Next is supposed to be a big vacation for the family, then a bigger house next year. Idk idk. Lol