My SO and I used to be really close and flirt and been playful and sometimes we'd tease each other with pics. But for the last month or so something has changed with him. He watched his friend go through a break up and ever since then something changed. We're not lovey anymore I try to be but he doesn't we fight almost every day and I'm not sure what to do. A mutual friend has told me to leave him but it seems like I don't have to coz he's already left me. What should I do has anyone else ever been through this?