How do I approach cute guys in college when I’m shy but my classes are gonna have a lot of people?

Since I’m going back to college this fall I’m gonna take psychology and either American civil rights or global studies and I’m super nervous because the classes are gonna be large and also face to face but I’m not sure how I can socialize when I get shy and whenever I see a cute hot guy I kind of freeze and get social anxiety. I wonder if I’m his type or if he has a girlfriend and if I will stutter or something. I really would like some tips though.
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I wanna attract 18-20 year olds like younger guys group. I hope i can. I feel so much anxiety and im scared they won't like me or notice if im older. I dress like im a teen tho
How do I approach cute guys in college when I’m shy but my classes are gonna have a lot of people?
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