Of all the ways we have found to hurt ourselves, the worse has been through love. We are always suffering because of someone who doesn't love us, or someone who has left us, or someone who won't leave us. If we are alone, it is because no one wants us.
Always remember the proverb: "This too shall pass." Your negative feelings won't last forever, there's a light at the end of every tunnel. It might not happen today or tomorrow, but you'll feel better eventually.