<human>: Can you succinctly summarize the text in 1-3 sentences?

Me 17M, her same age. Dating for a year and a half.

Yesterday, she and I were hanging out at my house, and she came upon some comics that I made in fourth grade, that while they were not important, I begged her not to give them back and to leave them alone because I was very embarrassed of them. She grabbed one and ran, and read it, then called me a baby because I didn't want her to see them. I tried to talk to her about it, because I was upset about it. She just started laughing at me, because it was "stupid" and I shouldn't be upset about it. She could not see why I was so pissed off about this. It's not really even about the comics at all, it's just the way that she treated the situation that I'm really upset. I told her that it was important to me, but to no avail. 

Reddit, am I in the wrong here?
<bot>: girlfriend made fun of me for something that was very embarrassing to me, I get mad, she can't understand why.