PleSe someone help me and give me advice!!

I have just found out I’m pregnant with my exes baby.....( it gets worse)....he has a girlfriend but he has been cheating on her with me for the last couple of months ..... iv been pregnant with his baby before ....and his reaction was not the best I hoped for....he wanted me to get rid of it ..and I did (because I was really young at the time ) I was only 15 and me and him had been dating for only 2 months so I got rid.... even though I wanted to keep it..(since then iv regretted it) I really wanna keep this baby becuase I can’t go threw wit that again it’s horrible... but what if he don’t want me to keep it WHAT DO I DO? .......

I feel if I keep it he will hate me? Or will I be a single mum?will I get the support I need??