He works at a computer repair store that I go to. He's usually very shy and doesn't say much, but he's always exceptionally helpful with me. I complimented him on it, and he blushed and seemed to take it well. After that he started trying to show off and started listing things to "fix" things on my computer that really didn't need fixing. I thought he was flirting, so I joked saying "I'm sure you do this for all the girls". He got kind of... weird. Said he didn't, and then kept glaring at me like I "tricked" him into something. I got a bit uncomfortable, and left. A few days later, I get my computer back and I see he's gone through it... like... opened documents that I know I didn't have up and looked through my pics... I can't tell if that's super creepy or just an introverts version of 'facebook stalking'. Help?