bringing the spark back into a relationship?

I've been with my boyfriend for 4 years , minus a small hiccup last year when we broke up for a bit , we  still dated during that time for some reason though . Well we got back together and things are different ... I feel like we are having issues overcoming the past and what happened between us . We still love each other very much and neither of us feel as if the relationship is doomed or over . We are just having issues bringing the romance back and bringing a spark back . I feel like the main issue is money for us ... and trying to find some things to do together in the winter . My boyfriend loves snowboarding and I tried doing that for him but I hated it . The things we want to do cost money and isn't exactly something we can afford .... what are some free things we can try together during the winter months ? Also what are some ways to bring the romance back into a relationship ?