Being a better girlfriend

Ki

I’m 16 and i’ve been with my boyfriend for 3 years now. He’s depressed and i’m helping him the best i can. I’m not a very good girlfriend, he’s told me this and i agree i need to change some things but i don’t know how. And no, he isn’t being a douche by saying this, we’ve talked about it.

How can i be a better girlfriend? what is a girlfriend supposed to do? i’m desperate for answers..