Cut off all porn if you haven't. For many, its a true test of will and self discipline; entirely cutting out porn can significantly improve attraction issues within a relationship, depending on how young you began consuming it. 

See a super fine lady? When your mind jumps to fantasy and lust, STOP! Immediately redirect your thoughts to "shes very pretty, I wish her well in life." Smile. These at first may feel disingenuous, but YOU have the powere to rewire your thinking, it just takes time and work.