Falling out of love?

[Illumine]

I don't feel that I have anyone to talk to offline about this so I was wondering, since you all seem much wiser than I, I'd appreciate your thoughts :)

I feel like I may be falling out of love with my boyfriend. We've been together nearly two years and it is long distance (but that has not really posed as much of a problem to me, as I've been in one before). He came to visit me over summer and I just feel that something in me almost snapped, like a light switch to my feelings towards him just turned off. Is it worth me really trying to make an active effort to "love" him again or do you think that once it's gone, it's really gone?

I just feel at a loss as to where to go in regards to this relationship. I feel that I just don't know what I want anymore, our communication has been strained since he got home from the summer visit and I just feel very lost and confused. It's very difficult to talk to him about these things because he has depression and is extremely sensitive to any kind of conversation like this so.. anyone have any words of advice for me?