Shower and exes

Vi

This morning I was taking a shower and my boyfriend walked in an told me I had to go because he’s getting back with his ex. I’m thinking everything was ok and we didn’t have any issues with our relationship so I don’t understand why he wakes up and is so cold and mean to me.... this is my worst nightmare. I’m losing faith I can actually find a stable relationship because random surprises like this. Me and him have been dating for 5-6 months... no arguments, no drama, we were even talking about me having a key to his place. He met my parents etc. He cried to me about how his brother passed away and we were getting really close... I’m sure I’ll get over this, but right now I feel so hurt and betrayed...