Is it being over sensitive to care about your boyfriend's phone wallpaper?

So I've been with a guy for 6 months now and he's always had his phone background/wallpaper as this model girl (one of those "suicide girls"). A couple months back he said he wanted to put a picture of me in it's place but he hasn't gotten around to changing it even though I've sent him so many pictures of me throughout the time we've been together.
For some reason, it hurts my feelings. I know, first world problems! but still. It's probably something stupid to be jealous over. Afterall, he doesn't know the girl. It would still make me feel special though, if he would rather have my face as the background, someone he actually cares about. Is it stupid of me to be a little hurt and jealous?
Is it being over sensitive to care about your boyfriend's phone wallpaper?
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