THE PERPETUALLY UNAVAILABLE
The only time they are available is when they need you. And when they need you, they hound you to death. However, if you are the one in need, no matter how many texts you send or calls you make, they never answer and leave you wondering if they have perhaps lost their phone.
EXPERT ADVICE: Friendship should be mutual; avoid making friends with the ones who are in it only for their benefit. So be kind to yourself, delete their number and get on with your life.