How to find meaning in life?

I'm 19 years old. I don't work because I'm being supported by my amazing boyfriend, who I love very much. I have depression and anxiety, including social anxiety so that's the main reason I don't work. I spend most of my time alone at home because my boyfriend takes our car to work and he works out of town. I'm happy with my boyfriend, but when he's gone I'm lost. I have nothing else besides him. I sleep a lot which is bad for me. The only thing I strive for in life is to have a child one day, but it's too early. My apartment doesn't allow pets, so I can't use that as a temporary. I don't know what to do. I feel empty, like if I think about my life I have nothing besides my boyfriend. Please help.

Thank you all so much for the advice and kind words! It helped a lot by reading them.