Why do I feel depressed all the time. I stay at home 5 days a week the only time is when my fiancé…

Why do I feel depressed all the time. I stay at home 5 days a week the only time is when my fiancé doesn't work an we have to go somewhere, I cry because all he ever does is work, we never go out hardly ever when we do he don't want to, I feel like nothing will change after the baby gets here. I feel alone. I go to my appointments alone an everything. Image barely went to the gender ultrasound. I start talking about the baby an he doesn't seem happy at all after telling me he wanted kids.. I feel like I'm absolutely nothing anymore.