Here's a tidbit about love in general that I think most people don't appreciate. We don't spend time on the things we love, we love the things we spend our time on. The spending time comes first. Infatuation may cause us to spend time, but only after spending our time and investing in something do we learn to love it. In most marriages that I've seen falling apart, things began to go bad when spending time together was no longer a priority or no longer possible. The attention that used to be focused on each other gets turned to hobbies, other friends, or sinful habits and these just eat up a marriage (hobbies and friends are things to share in a marriage).
I think the big question that you'll have to answer is whether he WANTS things to work out. If he doesn't want to "fall" back in love, then there's little one can do other than wait on God's answer (not that waiting is bad, as it obviously isn't, but just waiting when you can be faithfully acting is no good). If he is willing to work at least a little bit, then I think you should talk to him and see if you can commit to giving each other the most of your time that you can, to be spent together, whether just together, or together enjoying things you enjoy like friends and hobbies. If you can agree to spend a lot of quality time together, I'm confident you will again learn to appreciate and then respect and then love each other (I know you still love him, but you will both appreciate, respect and love).
This plan is in addition to the recommended prayer that others have mentioned. I hope it helps, and please be encouraged that each of us who responds is praying for you as well.