Everybody has had those friends that used them or only wanted to be friends when they needed something — ones who never cared to begin with. I don't understand it, but that's the way things are. It boggles me how people think that they can fake appreciation or affection to get something in return and expect that person not to be upset. Of course, the person is going to be upset by being used.
I have had my share of back-stabbing "friends" and broken hearts. It's a hard mistake to learn from, but it has to be done. I have a few very wonderful friends, but some were my favorite mistakes. I say "favorite" because they are the mistakes I learned the most from. Because I learned how to get hurt by people, I also learned how to not get hurt. I call this healing and learning mechanism a social detox.
A social detox consists of deleting contacts/followers/friends whom you don't talk to, don't like or who aren't nice to you. It consists of deciding who cares about you, who's going to be in your life in the long run — and this sucks but some people just aren't going to stick around as much as you want them to. You can't control how other people feel about you and what they want to do. What they want to do won't always involve you. Sometimes people will throw you away; maybe they don't need what you have to offer anymore, maybe it has nothing to do with you at all. You have to respect that they make the best choices for themselves.
You have to learn how to respect yourself enough to let people go. Your heart will be broken, you'll be angry and you'll feel like a part of you is missing, but on the other hand, you are losing someone who was never worth your time and love. You are losing someone who never deserved you in the first place. You'll find consolation in knowing that you were a good friend, you gave someone your time and love, you were able to love someone and care about someone other than yourself and for that, you deserve the world.
You are brave for putting yourself out there and making friends — for some this is a big feat. Making friendships opens doors, you attain knowledge by knowing people and learning what makes them who they are — sometimes you'll mesh well and other times, you won't.
It may seem like the end of the world when you've lost a friend due to any circumstance, but ultimately, there is a reason that they are gone. You don't need them anymore, and that opens you up to making new friends, experiencing sadness and heartbreak and knowing that you are stronger because you survived. Seeing beauty requires hurt. You are better off, I promise.