help?

I've been with my boyfriend for almost 5 years. I care about him deeply. we have had our up and down like most people but I think I have fallen out of love with him. a few months ago we got engaged and a few weeks after that he kinda took it back. saying he wasn't ready. I was heart broken. we have been working though it and trying to get things back to normal. I have forgave him but I don't think I love him anymore. I want to work this out because I know how I felt in the past and I was sure that he was the one. I just don't know what to do? any advice?