Just because he doesn't say it, doesn't mean he doesn't feel it, and doesn't show it...

From what you wrote, he hasn't given any indication that he doesn't love you, or that he's unsure about you, seems like for whatever reason, its the verbal he is specifically shying away from until he feels ready.

If you can learn to recognize the love in his actions, then maybe you will stop doubting him, and maybe even not need to hear those 3 words so badly.

If you really can't tell how he feels about you based on his actions, then I suggest you bring this up with him, preferrably in writing.

Explain that you are unclear about whether or not he is sure about his feelings for you, tell him that you don't intend for him to say anything he doesn't mean or may not be ready for, but that he needs to give you some type of indication that he knows how he feels and is not undecided regarding his feelings for you.

Like I said,it will do you the world of good to learn to recognize the love in his actions, they do scream louder than words afterall.