What would u do if u see this?

So my bf went out of the car for some time, gave me his phone to watch something on youtube, since i didnt have internet, i dont have an iphone, i didnt know how to use it properly? i was trying to figure it out and i saw this..

I was taken aback..

I put the phone on the side for a sec to digest what i saw, then i couldnt resist and i read the conversation..

We've been friends for more than a year and we've been dating for 6 monts, and this is what i saw..

What would your reaction be?

Update: Thank you so much guys for support. Its over. i moved on. And feeling much better. 💜 i didnt do anything crazy i just went back home and blocked him from everywhere. He doesnt deserve any explanation.