Getting back with an ex maybe

So, we’ve been broken up for about 6 years. Nobody cheated or anything, we accidentally got pregnant when we were young me 19 him 22. I miscarried and we weren’t really able to emotionally support each other and ultimately things went down hill quickly. After a few months of no contact we became friends no benefits just regular friends. Since we’ve both had nothing but failed relationships and the past 2 years we didn’t really talk much because the girl he was seeing wasn’t comfortable with me being his ex (which is understandable and I didn’t mind it) we checked in here and there but never hung out. They ended up having a kid who will be 2 nxt month. Back in late July he finally told me she cheated on him and left him and his daughter. We started hanging out in early August I got to meet his daughter out of the belly shes so funny and acts just like him. My relationship was already crumbled, i was trying to wait out my lease to move out. All the cordiality went down the shitter from the first hangout, so i live in a toxic environment 🙃. Anyway in September 1+1= we had sex and have been ever since. Now i feel like I like him as more than friends. I’ve done fwb before and never had this happen but it could be different since i did have deep feelings for him all those years ago. So i guess im not sure if i really do like him or if the sex is just so good it’s telling me I like him. Im not sure i should tell him seeing as im not sure my damn self. But i kinda want to because ion wanna fumble the same bag twice. To be clear im not trying to jump into a relationship, i just want to have full transparency and hell we could be in the same headspace for all i know. Would y’all tell him now or wait till your more certain?