“True friends stab you in the front.” -Oscar Wilde

Friendships are the same as relationships. That doesn't make much sense, friendships are relationships. I meant relationships as in a relation with a possible future life partner. I say that because the require some of the same things. Attentiveness; ie. calling someone often, making time for them, being there for important dates, following up on them to make sure somewhat and so on went well, hows it going. When you break up with someone there is a declaration of the end point. It is stated and ensured to be true so that both parties know; 'Its over'. This means that they wont call you anymore, they don't want to hear about your bad day, and they don't care if you got the job or not.
Why do relationships end? Distance, change, infidelity? I think friendships can end for the same reasons; Distance: They still live 5 minutes from you, but were worlds apart in what we do everyday. Change: You and them don't have similar jobs, one of us is working on is in school all day. Infidelity: They've adopted a new friend, They spend more time with them than their best friend. They make plans with randoms but not with the people who matter.
There's a reality about friendships, that you can spend time apart and not see each other for a while or talk and when you come back there is no hard feelings. Its somewhat true that with the best of friends not checking in is not needed because you know that you will come together again. Why are we so lenient with friends and so strict with boyfriends and girlfriends? I guess its because its the same dynamic but to a lesser degree.
How do you know when a friendship is over? Even though you've tried to keep up your half of the relationship; the person seems distant, the situations have changed, different people have come into our lives, they don't call, they dont call back... they dont read your blog... they don't FB... They don't txt. Since friendships lack the declaration of the 'its over' statement. How long can someone go without dropping a line before you know its over?