How would you feel?

My boyfriend knows I am bisexual and I’ve told him I’ve just never said anything to anyone, because I don’t think it’s anyone else’s business. We’ve been together for 4 years.
In the beginning he never joked around about it but since he met new friends a bit ago he makes little comments about how I’m in the closet and how my family doesn’t even know. It bothers me and he says it’s just a joke. What would you do?
How would you feel?
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