Feel like giving up

I don't know why I keep holding on to someone who I should just let go. Misery loves company and I honestly don't want this bullshit. Feel like yes I love this kid but I'm mainly with him for the baby I'm now expecting so I put my happiness aside just for this baby... But idk how much longer I can do it. Close to getting my shit together and walking away from this guy forever. Everyone said it's just my hormones but it's not. Just venting sorry 😢