As a type we naturally avoid conflict, because I think we don't like making others feel bad. Actually this may be short-term thinking, we're only dealing with the feelings of the present and not thinking of the feelings of the future. Interesting notion that.
Anyway in the long run, break-ups are usually for the best. If two people were meant to be together then they will be together, but trying to salvage a relationship that isn't supposed to happen is a recipe for miserable people.
Perhaps we INFP need to think of conflict in terms of short term versus long term sometimes.