some advice plz

I've been dating this girl that I really really like.actually I think I've fallen in love with her, but since summer started she'll go days without texting me and it makes me worry about her a lot. And I've told her I get really worried about her and she said ok and stuff, but I sorta feel like she doesn't care about me at all. Even though she's told me that she loves me and she cares about me, I can't help but feel like I'm the only person trying...I don't know what to do or think or anything, and I do sometimes have problems with anxiety and depression...could someone just message me or something?