Hi there, I am an introvert with mild depression. I felt the way you do for a very long time. Even now, I occasionally long for friendships with a deeper quality than the ones I have now. (Although I do love the ones I have dearly, just really don't have deep moments with them). For what it's worth, one thing that helps me is projects/interests.

I made a small-doable bucket list and I work on it a little at a time. Find free craft events at local libraries and community centers, download second language and yoga apps to do in my down time. Youtubing skills that interest me (crocheting, knitting, whatever). Just a suggestion, but I find it helps me enjoy just being me. :)