I've like this guy for two years and I still don't have the courage to go and talk to him! Help!!

Perhaps this is going to sound strange, but if he doesn't know you exist, then why bother yourself with the thought of him?
These are some of the crucial questions you need to ask yourself;
a) Has he ever spoken to you
b) Does he look at you
c) Do you know anything about this guy except the fact that you like his physical appearance?
Mind you - the third question is crucial for YOU!

If you do not know anything about this guy and haven't actually met him and conversed with him you can not be in love with him! You are, therefore, clearly infatuated! This can come off as a feeling very similar to love, and sometimes even stronger, but you need to ask yourself these three questions so you can definitely see which path you're on.
Since you seem to be dating I would definitely call it a second class infatuation, and you don't seem to 'love' him as much when you're around him and when you're not. This is another clear sign of infatuation.
First, you need to clear this up for yourself before you decide to state you're in love, because being in love is a very serious thing.

Hope I helped


*StillWater*