You are not scum and you are not worthless, I know this because I know that there is no person alive who is!
As others have said, you need to work on your self-esteem, and your ability to be autonomous and independent.
However I disagree with those who say:
- he is probably seeing someone, we simply don't know that.
*and that you should start to just concentrate on you and baby, because often this is a major cause of why men start to opt out, they opt out because they feel pushed out.
So, I really do think you need to work on yourself, on your life, on looking at work/study/leisure time. This will do two things: show him you are strong without and with him, and prepare you for life on your own if that is the eventual outcome.
I think you should stop acting desperate,clingy, sad,and dependent and stop waiting on him, it won't work. But neither should you become combative, start pointing blame, nailing him down on certain issues, and giving ultimatums, or imagining all sorts without proof. That won't work either, and you might reflect later and conclude "I pushed him away" I say this because you seem to be a person who internalises things and holds herself responsible for everything, as though the fault were all your own. It isn't but it is easy to fall into that way of thinking.
So, if it is him you want, don't cling, but instead work on yourself. People fall in love with others because those other people have something about them that they respect and love, make yourself such a person. People do not fall in love with people who simply make themselves a door mat.