Is this a psychological problem i have or am i just a door mat!?

I broke up with my ex becuz he emotionally abused me, lied constantly, and cheated. While we was together he had with his ex without a condom, he claimed she forced him to do it! I was stupid and took him back, i caught him giving his number out to girls on facebook he apologized and cried when i tried to leave so i took him back, yesterday i needed him and i was really sad and he acted nonchalant, i tried calling him he didnt answer and when he finally did answer he cursed at me and used profanity he claimed he didnt hear his phone ringing, n then said he was getting a tatoo.. so i let that slide n i called him back hours later and i could hear girls in the back ground he rushed me off the phone didnt say I love u like he always does and he didnt call me baby once he talked to me in a friendly manner he didnt even say my name! it was like he was trying to persuade others he was talking to a dude or a friend on the phone! I called him back plenty of times after that no answer until 4:30 am was he with a girl??? i confronted him about it because i have noticed he has been acting very distant lately its like he has been spending time with someone else, for the past couple of weeks he has been busy, to tired to talk, not answering when i call claiming he felt asleep. I broke up with him today, and instead of him screaming and being upset like he always do he was very calm to my surprise and said ok fine if that makes u happy?????omg does that mean he already had someone so he doesnt care>