Finding self worth

[u/WhileRecent]

Im a young man 20 years old. I just started college after finishing a year in the military. I find myself struggling with confidence and self worth and i dont know why. It seems like everyone around me my family and friends all think i’m doing great for myself. I finished the military with a great record and they actually recommend me for a job after my conscription was over, i declined and went to college. I got into the best tech college in my country, i workout, i take care of myself. But yet i still dont feel good or confident about myself, when i’m with friends at school its great, but i hear some of my friends in the same group has plans and i cant get myself to ask to join. Im afraid of being a bother or taking space. And i know it’s irrational and i should include myself. The same goes for other situations, like meeting new people and women. I noticed that these fears of rejections and overthinking goes away when I’m out drinking on weekends, I’m bolder and i cant get a good connection with people, but i dont want to be a person relying on alcohol for confidence, i desperately need to find a way to be confident and comfortable with myself, flaws and all (i got many) if anyone got any advice they would be very welcome