What do i do?im soo confuse?

ME AND THIS GUY HAVE BEEN TOGETHER FOR 3YRS ,4 YRS IN SEPTEMBER. IVE BEEN SO THROUGH SO MUCH WITH HIM IM TALKING 2 ABORTIONS JUST BEACUSE THE WAY HE USE TO TREAT ME.AFTER THE SECOND ABORTION I LEFT HIM WE WERE BROKE UP FOR 6 MTHS .HE HAD A GIRLFRIEND AND I WAS ALSO WITH SOMEONE WHO TREATED ME LOVELY.BUT WHEN THINGS WENT WRONG WITH HIM AND HIS GIRLFRIEND HE WANTED ME BACK,ME BEING STUPID I WENT BACK THE FIRST MTH I WENT BACK I GOT PREGANANT THIS TIME I WAS NOT GETTING A ABORTION. MY SON IS 11 WEEKS OLD .BUT THIS REALTIONSHIP IS SO MESSED UP .HE DONT TALK TO ME,HE DONT HOLD ME WHEN WE SLEEP .HE ALWAYS TELL ME IM STUPID ITS ,HES GONE ALLDAY EVERYDAY UNTIL NIGHT TIME. HE DONT DO NOTHING FOR ME OR THE BABY.EVERY TIME I MAKE HIM LEAVE HE COMES BACK.NOT TO MENTION I CAUGHT HIM CHEATING .HOW CAUSE HE CALLED HER OFF MY CELL PHONE. IT SEEMS LIKE HE JUST NEED SOMEWHERE TO STAY.PLEASE GIVE ME ADVICE ? WHAT SHOULD I DO MY BABY IS ONLY11 WEEKS..