Tempted to return with better results now that the truth is out ...?

you seriously need to let this guy go, he is pretty much getting the best of both worlds, he has a gf to keep his parents happy and he has you for the FWB thing. You can do so much better than him, if he cant commit to YOU and you ONLY then he is not worth your trouble, the only person u shud be commited to right now is you and ur child. You should honeslty get rid of this guy