I’m scared of losing my hair please help? need helpful advice?

Ok well I have male pattern baldness I think, which means I will lose all my hair eventually. I’m only 21 and I’m really worried, because I am receding alot at the moment, but my hair is styled that it is covered up. I sort of hide behind my hair, because I think if i lost my hair I’d be doomed. at the moment my hair isn’t too bad, but when it starts to show i’m going to be really self concious. I have tried the shaven/buzzcut style before and I do look ok with it, but I’m just scared that when the time comes (maybe in a year or 2) I’ll have to shave it all off and stick with the buzz look :(

Also i’m starting university this september and I’ll most probably have to shave all my hair off when I’m there. This will deal a big blow to my self image lol. What will the girls think!? people will think I look old (even though i have a reasonably youngish face) I don’t want to look like a 50 yr old man at the age of 21/22. Please help any advice for me to make me feel better!?