The dating process is the perfect time to weed out those people who are not compatible with you. That is what it is for. Get out of the relationship and find someone with whom you can enjoy these activities. If he is a couch potato now, just wait untill you are married and have a few kids. The two of you will be sitting home every night, eating potato chips, and watching reruns of reality shows while the rest of the world is busy living. MY advice is to RUN.
Steve