pregnant & stressed

As i write this post at 5:55am when my bf just got home i am completely furios and angry i am 32weeks and he hasnt stopped going out at all.  Throughout out entire relationship he has done shady stuff to me & idk why i stayed. Where going to have 3yrs together soon and i cant say i fully trust him as i did once and yes i know youll say why you stayed ushould leave but this guy is the love of my life and i want to make it work for our son. Were supposed to be moving soon to our own appartment and idk if things will get better or worse. I dont mind that he goes out but to leave ur house and come home at 6 is ridiculous. We are both young 21. I regret not leaving when i had the chance but i dont regret it that much because i have my new blessing which is my son. I need some advice and support. No rude comments pls i am at a stage that i just want to cry & give up. I dont want to hurt my son. He was so active & moving but when my bf got home he hasnt moved at all. It breaks my heart that my son can feel my pain inside of me