I personally don't like the idea of "true" love. Because thinking that there is only one person fated to be your perfect match is kind of... disheartening? What happens if that person dies before they get to meet you. Or what happens if they die while with you? Are you never allowed to move on eventually? Love is love and the ones that work out the best are when your personality, characteristics, and interests match up the best. There are billions of people on this Earth and there are thousands if not millions of people on each continent (except Antarctica) that would be a good match for you. Sure, some definitely work match up better than others but there will always be people that work well with you. Everyone is going through different stages of your life. The type of person you're interested in when you're 18 really will be different from what you want when you're 30. Even if someone would generally match up well with you could really not depending on what they experience later.

Plus, depending on the flaws, sometimes it really is better to break up. Now of course, both have to be willing to work on the relationship and understand that petty mistakes are not something to get terribly worked up about but people are always different for each other and when one is significantly less invested than another, then sometimes it doesn't work out no matter what they want.