Most Helpful Girl
Most Helpful Guy
You should workout for you, but being motivated by women to workout isn't bad. But you have to understand just working out won't make you a better person or partner in a relationship. If you have a girlfriend, continue to pursue her as if she wasn't yours just yet. Make her feel sexy and powerful.
It helps if you're ambitious and work on yourself as well, but not for her. It has to be for you.