I'm not sure if I'm just socially awkward but I can't keep a conversation going for my life.
All of these usually happen when I'm talking to someone:
-I can't make eye contact with them
-I never know how to respond to anything
-I stutter
-I feel like everything I say is extremely stupid, and regret saying things

Any advice?

See a doctor about your anxiety. It sounds like you need a mood-stabilizer
And cognitive behavioral therapy. If you can't afford a private doctor, seek
Help from your County Mental Heath Clinic.
Good Luck.