This is not really a unique issue. I know we are unique individuals and no relationship situation is one hundred percent the same, but we are more or less the same in our behavior and actions. Just to let you know.
You've been with a guy for two months and you are "falling out of love" already. How do you know that it was love in the first place? Love is something that grows more deeply over time as you get to know somebody and feel that connection.
You sound like you are an intellegent girl and are in tune with your feelings. But what you are doing is not being honest with how you felt. Like you mentioned before you were trying to lie to yourself but see it for what it is, he is becoming to needy and clingy and you are turned off by that. While he should pick up that you are purposely avoiding it, too often are we caught up in our emotions to think about it logically and pay attention to these signs. That's why you have to be up front with how you feel and let him know. He's not a mind reader, but something should click when your actions and words match up.
I wouldn't base your relationship on your friend's scale of one to five. It's important and it helps to identify these things, but there is no number or guidelines or rules that should dictate how each relationship should begin or end (well besides cheating, that is a pretty obvious one).
I know you don't want to hurt his feelings, but if you "suck it up" and wait five months, you are going to resent him more and it's going to hurt him more anyway. If you really care about him let him know how you feel, everything you told us here and take it from there. Not being honest, letting the things and resentment build up is just a ticking time bomb waiting to go off.
Waking up next to a beautiful girl,
Step outside and say hello to my beautiful world.