I'm so lonely all the time.

I try my best to be as kind as possible to others, I put others before myself and always help people out where I can. I'm concious that I could come off as clingy or weird, so I don't go overboard, only where I'm asked. I also have a lot of personal hobbies.

Despite this, I'm always ignored, most of my friends never talk to me, I have began to struggle making friends. I feel so lonely.

What am I doing wrong?