Feeling Depressed...not sure what to do

I constantly feel like I’m not included with my friends. They all say they’re my friends and then never really want to hang out. Then I feel like school and work are just consuming me, although I don’t do much of either. I enjoy working and used to enjoy learning but I am about to graduate college and just feel empty about it. I’m not sure when this really started, but it’s been at least a year. I feel like my birth control is the main cause, along with some school stress. I just feel lonely very often, even though I have a wonderful family that I talk to 24/7 and love spending time with. I’m not sure what to do.