Im confused about this boy&im in a relationship with another , HELP !?

so i met this guy and went out with him for 7months idk how i fell in love with him but i did i hated how he never had time for me and when we were together it was special to me every minute with him was worth it he made it special we broke up after i found out he cheated i got a new boyfriend 7months after now pregnant with him & IN love with him , my ex texts me to see how i am but yet brings our past up i know hes a changed man now and im starting to think if i should go back .. my boyfriend now is wonderful he hasnt left my side since we met 3 years ago first we were friends , lovers & now soon to be parents but im starting to think im just with him for the baby&for the love that his parents have for me .. ughh so confused what should i do ? take a break ?