No guys have really taken an interest in me
Maybe you are so pretty they think you must have a boyfriend, so they don't bother. Why not ask them out?
I also got a vibe of depression from you. Clinical depression which might need meds. But you didn't describe any physical symptoms. So I'm not sure.
To get more confidence, I set a challenging goal for myself. This might be in relation to hobbies, exercise, school work, saving money for no reason, or for a "toy", or something else. Then I can look back and see all the goals I have achieved, and it's pretty good, actually.
I have a long time interest in psychology, specializing in relationship dynamics for 30 years.
(Please note, we give the best advice we can based on the information given in a post. For better advice, please include the age of all romantic partners.)