This baby is simultaneously the biggest and least of your problems. It sounds like you really, really don't know what you want out of life. A lot of your decisions seem based on how others will react: you didn't break up with her because you didn't want to ruin her. You might want to have a baby because it will make your family proud.

I don't know how to say this other than bluntly: you need to grow up. At some point, as an adult (why am I saying this to a 31-year-old man when I'm only 25?) you make decisions and you just go with them and deal with the consequences. At some point you just go with what feels right and don't worry about what everyone else thinks or whether you're missing out on all the other options. You have crippling FOMO. If you have a baby with your gf, you miss out on dating other women in your prime. If your gf has an abortion, you miss out on having a kid. If you break up with her, you miss out on being with her, but if you stay with her, you miss out on other women. That's life. You can only choose one option at a time. Go with your gut and do what you want right now, and just tell yourself that there are no regrets later. You did what you felt was best at the time, and if your feelings change, then you make a new decision down the line.

Here's another pearl of wisdom: life is what you make it in every circumstance. If you have a kid, you will not ruin your life unless you let it. If you stay with this girl, it will not ruin your life unless you let it. If you have an abortion, it will not ruin your life unless you let it. If you focus on seeing things to be thankful for in life and enjoying what life dishes out, you will be so much happier and won't have such crippling anxiety about big decisions.