Should I keep reaching out?

My friends have gone to college in different states and completely forgot about me. I’ve fallen into a very bad depression. Its not been this bad since 9th and tenth grade. But now that I’m in college, alone, I feel abandoned and unwanted from people. I’ve been completely alone for 4 months and I’ve reached out to my close friends but they’re all saying “that stinks” “sorry” “well I’m just saying we’re busy, we don’t have time for friends rn”. I make time to talk to people. I use to reach out like once a week, because there was a point where I was thinking about dying. I really needed the help, and they just brushed me off.

The question is, do I continue reaching out? Maybe one day they’ll think that I’m being 100% serious? Or do I just leave it alone ?