Collecting hair?

My boyfriend started joking that he wants to have my hair as something to remember me, and he asked if I could bring my little niece hair as a souvenir. I feel very creeped out and I told him that I don’t feel safe when he jokes like that. He apologized and said he didn’t want me to feel this way, and he was just joking. But still I don’t feel comfortable now and in few days I am going to meet him. What should I do?
Collecting hair?
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