What is the movie?

Hey All, I am looking for a film. Information i remember is vague but i will do my best. - 2 brothers, 1 girlfriend. - I think the brothers fight at the end and one gets badly hurt/killed. If my memory serves me right, Brother 1 and girlfriend are happy. Brother 2 comes to stay and starts to get feelings for the girlfriend. This escalates through the film. ( I think the girl starts to fall in love with both ) but could be wrong. Set in USA/ i kinda keep picturing one of the brothers having a cowboy hat! All i know is i watched this film many years back and think its a little older and really want to watch it again. help :)