help :(

i like this guy and we are going to graduate this năm and i want to tell him i like him (for like 3 years) but i dont want to do it now and mess up our friendship the last year. Do u think i should wait til after graduatioon to tell him?
btw all my Những người bạn hate him so that makes it even thêm awkward. he's not mean just a lil to outgoing for some people.