Just because someone doesn't love you the way you want them to doesn't mean they don't love you with everything they got.
As humans, it is inevitable that we will encounter relationships in our lives that we don't fully understand. The relationships that are formed with people, especially the relationships that we form with people when we are younger, give us the experiences we use later on in life to form the newer relationships. When we are older and have more experiences, and are just meeting people who are in the same boat, the way that we treat each other may not always be fully parallel or copacetic, as we may desire. This should not always be a deterrent to developing new relationships for it is in these times that great relationships can be formed.