Pregnancy alone

So I’m 30 weeks pregnant with a boy only 10 weeks to go now crazy ! I’m so excited to meet him but have never felt so fucking alone and sad I feel like I didn’t even let my self or allow my self to enjoy being pregnant the dad decided not to be in our life’s and moved away and only would see me for basically booty calls but hasn’t talked to me in a month which makes me feel like shit idk why I would continue sleeping with him knowing he doesn’t care about us I guess it’s Bcz I’m just so sad and want nothing more than him to be here for us so bad I think about that a lot on what’s so wrong with me that he can’t just be involved with the baby I’m not asking him to be with me I just want him involved and to at least care idk I’m just really sad