Losing love and interest

My current boyfriend and I have been together for about 4 years now and we have a son and a new baby on the way. We've had a roller coaster relationship for the past few months, including having a ton of verbal and physical altercations, the worse being him having choked me and made my head bleed pretty bad. Overall I forgave him because I love him, but during the situation he admitted that he had been having sexual conversations with other women and he continues to hide his phone his social media and other things that cause me to have this lingering suspicion of who he's been talking to. More over our main problem had been the fact that he refuses and has shown a lack of interest and affection that I've told him multiple times I personally require in order to stay invested in this relationship. This month he's been going through a rough time because of a lose in his life, but I sit back stewing wondering what and who he's dedicating all the love and affection I once got to. He used to be so all about me, with my picture all over his phone professing to the world on numerous occasions how happy he is to have me how all about me he is, but now I don't get that! He took two months after he had moved back in after out big fight to even add me back on his social media still listed as his relationship status is "complicated". It breaks my heart whenever I think about why he could be hiding things from me, the fact that he doesn't understand that it's not just me whose not gonna take his actions, no women would allow half the shit that I can't get him to sop doing even when I beg and fight! I don't know what to do anymore. For a long time I asked him if he wanted to lose me and his response was so generic I feel nothing comes from the heart from him anymore! I've considered cheating as a way to show him he's had the best thing that can ever be given to a man and he's taken it for granted, but with the current pregnancy I feel stuck in a loveless affection less heartless relationship that the man I put my all into is just waiting for to end. There's so much more that I just can't express everything in one setting. I need advice. Maybe what should I do? How should I react, where do I go from here?

It's in black and white and it's staring you in the face, this man is not mature enough to settle down. You already have a son and with another on the way, it's not going to get any better. Your children will need you to be happy and going by your post, you obviously aren't and you not going to be remaining where you are. Why consider cheating and going down to his level? It's all okay to love him but to what expense? What about the abuse? It's easy to say and damn hard to do, but you need to move on from this guy and as the previous poster has said, why put up with it?