Compared to the majority of posts I read, you seem extremely self aware and have done the mature thing, even though it hurts

All I can say is will get better and you will soon realise you did the right thing as you deserve more

I think you should propose. She sounds like a real keeper

You've been together for a month so you aren't in a serious relationship and you definitely don't love her

In that time she has cheated on you and got pregnant, quite possibly with another man's baby

She wants to get an abortion. Let her. Leave her and go and find someone who respects you

So she's lied about who she has been talking to, deleted messages etc and is now trying to accuse you of something you haven't done.

Why are you apologising when you know you didn't do anything wrong?

Either she's incredibly insecure and controlling or she is up to no good again and is trying to gain some moral superiority

Either way she sounds like a massive red flag. Do you really need this crap when you're only 22

Bin her off and concentrate on your engineering degree