I broke down

Me & my ex have been not going through much but we just can't seem to stop talking. We were together for a whole year & then I found out he cheated on me during a break that we took & the girl ended up pregnant. Now 7 months later he lives with her, the kid is born, & we have met up to talk about our "situation" which we don't really have one! We just can't seem to stop talking. We can literally go weeks without speaking to each other but we always end up going back to each other.  A few months ago we met up & we had sex. It's not our first time, we've had sex throughout those 7 months of not being together. But what I'm saying is that I found out I can't have kids, & 2 months ago I got pregnant, my ob said it was because the medication that I was taking was helping me but that I shouldn't be excited because there was a possibility that I can loose it because I started to develop cyst in my ovaries. I haven't told anyone I was pregnant, not even him. I didn't love him like I used to I just liked the way me & him would talk, like friends. It didn't hurt me that I was pregnant, I have an amazing job that I know I can provide for it.