<human>: I dated my ex-girlfriend for a little over a year. We fell in love, but we eventually broke up. We've since started dating again. During our break she dated several men, the most recent was very cruel and left her damaged emotionally, among other things. We recently were at her place with impromptu plans to go out that night. I was not prepared, only having an old shirt that I wore earlier because I was working on my house. She previously told me that she bought her ex-boyfriend and shirt before they broke up, but never gave it to him. She decided that she wanted me to wear that shirt instead of one of several others that she had available, I refused and an argument ensued.

This seems like a trivial argument, but we're both stubborn so it did get a bit ugly. My reasoning was that I was not jealous of him, but resented him for being a jerk to her and I didn't want to wear something that was sentimental for an ex, especially since I still had feelings for her while they were dating. Her reasoning was that my not wearing the shirt was symptomatic of a systemic problem with my maturity in not being able to get past the fact that it was a gift intended for an ex.

Can you give me the gist of the text in a nutshell?
<bot>: My ex-girlfriend who I'm dating again wanted me to wear a shirt she bought for an ex and she became very frustrated and argued with me when I refused. Was I wrong in refusing to wear the shirt?