wronged

been married for only 2yrs and have a dd. recently just went back to work and there's this co worker who I think i might have a crush on..... my husband and i fight most of the time. could it be because of that i have a crush on a co worker?! bc he treats me rly well whereas my husband is just rude and lazy. what to do..? I married my husband bc i was pregnant.. he did me wrong many times. i always choose to believe he will change. the way he talks to me is also very disrespectful most of the times. we just can't communicate.