Things will always fall apart before they get better. Sometimes the worst things happen to us so that something better can come into our lives. You can think you found someone, possibly even "the one." Then, one day, they might break your heart - even if they promised not to hurt you. You may think that it won't get better. But eventually, it does.
My life felt like it was falling apart. I felt like I was trying so hard for something that the other wasn't trying for or didn't want. Sometimes you feel like you just want to break down and cry all the time.
Then you learn to focus on yourself and to do things that will benefit you... Whether that means hitting the gym to get that awesome body or going away and getting away from all the drama. Do whatever is going to make you happiest.
Travel, meet new people, try new friends. This only hurts because you care, and once you start living and having fun the pain starts to go away and you can feel like yourself again. So don't be afraid of change, it will always happen for a reason.