Other girl holding my boyfriend's hand, what do I do?

shes a close friend to both of us, and I don't hate her,

but when we went out she held his hand and pulled him to talk to him on stuff we wanted to tell her.. but she took him quite a distance away... then his friends were like "are they dating"

which kinda made me worry, thus this post

of course I said "nope and he's with me"

a few days later when I was holding hands with him she came on the other side and held his hand

we talked about it later and he said stuff like "I'm OK with it" without asking how I actually felt.

what do I do?
Other girl holding my boyfriend's hand, what do I do?
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