Help i think im in to deep

So I just started going to the gym a month ago. About 3 weeks ago I started talking to the guy at the gym. it started out just talking about working out and what to do with pre workouts to take and after workouts to take. then it evolved into something more. the problem is I'm married I'm not happy in my marriage I've tried telling my husband but things never seem to change or get better. last weekend I slept with gym guy. since then we have slept together two other times. i really have no clue what to do. I love my husband but I'm not in love with him anymore. I really like gym guy not just because of the sex but because of how he makes me feel. when I'm with him I feel beautiful and full of life. he makes me feel wanted. where as my husband turns me down every night I ask for yes and would rather play his games then have sex with me. he never wants to go out with me.