I need good advice to keep my BFF relationship strong
I have a best friend and recently we have been falling out over silly little things such as her taking my rubber and pretending she didn't have it and she got told off for talking and blamed it on me for telling off her (though apparently she knew it wasn't me, so what?) or her telling a lie about who I have a secret crush on (she knows who it really is, but she thought 'as a joke' she tell people it was someone else). And how it that MY fault exactly? She keeps on going on in tiffs over nothing and I can't seem to trust her anymore. I keep on running back to her and saying sorry for nothing so she won't learn. How should I act next time?