Do I need to go to a mental hospital

Hii guys !! I know it sound like a serious situation, but it’s not really. I just feel like I am crazy and the only one experiencing this. So I am just going to ask is it normal to have a crush on someone and think about them after you only made eye contact with them one time ( I am not joking one time that is it ). I think maybe my brain works this way because I am 19 and never had much romantic experience ( I mean not at all if I am being honest ) and even when someone looks at me i go crazy. It is really exhausting. I know I will probably never see them again and we made eye contact accidentally, but my brain does not want to let go. I should get a new hobby. Is anybody else in the same situation or should I really check myself into a mental hospital .