I go to he gym as well. My biggest thing was I just lost my sense of self in the relationship always being a unit and not a person. I lost my hobbies, friends, just throwing myself too deep into the relationship. Take a step back and try to find some great hobbies. Maybe stuff you used to do. Friends you used to see regularly.

I took up building models, Playing games I didn't used to play, I got with a friend to learn blackjack for fun. Sometimes its just the act of looking for more activities that can be helpful and fulfilling.

Depression also plays a big part in making us feel like what we do isn't enough when in other circumstances it can be.