Boy problem!!

so lets see I have this guy friend and we talk like every day (just because we have a class together in school) but then he added me on myspace too and messages me on there and the other day he told me he had a crush on me which is cool and all xcept I...

have a boyfriend that im in love with (we've been together for 3 month which have been the best 3 months of my life.I met him at a very bad point in my life and he's helped me become such a better person and I don't know its just been great.and I wouldnt trade him for the world he's my life and I plan on marrying him someday)(p.s. dont give me sh*t on the fact that we havent know eachother long enogh to be in love because thats bull sh*t we've been together almost every single day since we met so even though we havent know eachother for very long we have gotten to know eachother very well and I don't know thats all I'll say about that I guess) but anyway... I know if there was a girl that liked him I would be pissed if they talked all the time (yes im a very jealous person)(but so isnt he) so should I tell my friend that he has to stop bothering me so much b/c if my boyfriend knew he talked to me so much he would be mad and besides that I feel like im doing something wrong talking to a guy that likes me when I have a boyfriend even though in my eyes he is just a friend I know he wants more and so it seems wrong to talk to him... I don't know im just scared to do something wrong and mess my relationship up b/c I know I would never forgive myself

All you need to tell him is that your flattered, but you have a boyfriend that you are very happy with.