I feel like a horrible person

I am 8 weeks pregnant and at first I didn't want the baby seeing as I'm only 17 but when it came to the abortion I cried my eyes out and I felt so relieved that I didn't go though with it and I am now excited about keeping my baby! My family is supportive although my dad doesn't know yet but all I know is I'm happy with keeping the baby, however.... the father of the baby I was seeing for a while and then I told him I was pregnant ( when I wasn't keeping it ) and he was being supportive, a week later he just blocked me out his life and started seeing another girl. I then told him I was keeping the child and its up to him if he wants to be involved of not, he tried and tried to change my mind and made me feel like I had made the wrong decision, now he knows I will not change my decision he's just completely stopped messaging me, am I horrible for keeping a baby when I'm not with the father and he doesn't want it? But I know I can do it alone and I'm happy to do anything for me this baby, I am going to the best mum and prove everyone wrong but he's making me feel like a weirdo for wanting it?!