Why do every friend I make just lose interest ?

It is not always your fault when friendships fail. Depending on your age. Young people tend to loose interest quick and look for something else to do. You may befriend the wrong kind of people ? Don't try to form friendship with popular kind of people but look for someone like yourself. Also the place you find friends can be the reason why they lose interest. For instance people who go to a gym have friends at home. They go to do some excercise but they are not always looking for someone to befriend them. Don't get too disappointed because you don't need a lot of friends. Sometimes even one good friend can be enough. One day you will find tha person I am sure about that.