How do you react to small digs from your partner?

After a year of dating I shared today with my partner that I made a picture of us as my wallpaper on my phone
I thought it was a sweet thing to do and I like seeing this picture of us together
Instead of saying oh that’s cute , I got met with what is this
When I mentioned what I had done, I got met with after brownie points are we
I was a bit gobsmacked tbh
Thoughts on this reaction from him?
How do you react to small digs from your partner?
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