Fallin' in love.. Fallin' out of it...

Falling in love is such a wonderful experience. Being in love is so much better. Such an incomparable feeling. Such a happy feeling...That is, if you are not in a situation like mine...
After a few months of being in this relationship, I seem to be confused. Am I still in love with this man? Am I doing all this sacrifice /compromise for him because I am in love with him, or I am just trying to make it work just to prove to myself that I can make it work? I've become a cynic when it comes to relationships, I am surrounded with failed relationships that I really don't expect any relationship to last long.
I am really unhappy with my relationship with him. I just can't say it to his face. I am so afraid that by telling the truth, he'll be disappointed and unhappy. I still love him that way, I mean, I don't want him to feel unhappy. But right now, I really can't say that he makes me happy, even when we are together. All I want to do is cry. I think he knows why I am so unhappy, he just can't do anything about it.
What will make me happy? Ultimately happy? I do not know yet. But plain happines? All I know is that he can not give me what I NEED, and I know this NEED will make me happy.
If in case I am still inlove with him... I am sorry, I just want to fall out of love with him...