Assalam-o-alaikum! what I think about ur problem is dat u SHOULD tell ur parents abt him. I mean how longer can u just go on without saying anything?? In my opinion its impossible!! yeah, (thats what I think) and you see (as you said) that you both know each other for a couple of years so how are u hiding your feelings? Sorry If u think I am saying too much......What I think is that you shoud go and tell your parents. Its something very important in your life, rite?? Its a big step, you cant take it without an elder's help.
Know what? In islam, i read in a book that if a women likes someone she has to tell it to her parents/guardians, in order that they would guide her and proceed the talks. And I have to tell you that a marriage in which parents are also satisfied, its successful and I heard it in a lecture, they said if a girl likes someone she should marry him as soon as she can and the person she's going to marry, she should know everything about the person including the parents(they should also know everything about him, like wat he does how would he keep her daughter) and like brother Omar quoted a hadith, i can remember some of it. The prophet especially took the name of the youngsters coz as u know this is the age when a girl or boy they are near to doing the bad deeds, so thats why he said that they should be married, as marriage stops from committing sins. I guess thats all I had to say!! (sigh)
hope it helped u a little
and I wish I was able to say all that in my language, that would have been much easier
may Allah help u sister...Ameen
wassalam and sorry if i said tooo much...

good luck