Most Helpful Girl
Honestly, it's hard to tell without knowing the guy. In my experience, there are a lot of guys who don't attach emotional meaning to objects. I've done that a few times as well; I sleep with a stuffed animal that my ex got me while we were dating, but I just don't associate it with him anymore (we only dated for 3 months). I feel like it probably doesn't mean anything. If the shirt was important to him because it made him think of you, he probably would have gotten rid of it once the relationship ended.