Thinking the unthinkable

Chardonnay
So I have been in a relationship for a year and half. We got pregnant and he seemed excited about it. He works a lot and I only see him maybe once a week. Never see him on holidays or my birthday. He is a diesel mechanic for an oil rig company and claims to work 24/7. I'm just tired of being let down all the time. Not being able to get a hold of him when I need to. Him never showing up when I need him or going to any of the appointments. Falling asleep on a tear soaked pillow which could also be from hormones. I think I want to break up with him and be single so I know I'll be doing it on my own rather than waiting for him to step in. It's just hard because where I live, I have no family and no support system so it would be rough. I'll take any and all thoughts or criticism. Lay it on me.