Need advice.

I’ve been with my boyfriend 5 years well he bought me a tablet for my birthday. Well I had it charging and I went to bed. Well I woke up this morning and he had it turned on sitting in his chair. I feel like my privacy has been violated. Am I over reacting? or should I be mad about it. I mean I don’t have anything to hide but if he thought I did shouldn’t he have asked instead of going threw my stuff while I’m asleep? I’ve never went threw his and I’ve had plenty of opportunity’s.