am I in the wrong?

I went on my boyfriend phone because my internet is down and he said get off my phone made such a big deal over it he can see what I was doing he was right next to me I was on it before bed to go on Facebook because not tired and he said get off it I don't go on yours I said you can if you like etc he made big deal I kept repeating why am I not aloud he said because your nosey and you'd look at my messages? Wtf... never done that before so bit rude He's making out he's got something to hide.. fuming absolutely fuming