Ok, so today my friend told me we shouldn't be friends

She was my support system, my sister, my best friend, & now she says I don't think we should be friends. I couldn't find her at all in the hallway, I usually see at least four times a day. Now, I don't have anywhere to sit at lunch, & I do not have anyone sit by. I have other friends but they like her too, & I am sure they will choose her side.Now, I have no true friends.I don't know what to, I am just, so depressed right now
I really want to give up right now.

Now, I really see no good reason for living.I have been contemplating, & I am seriously considering it