Boyfriend

Stephanie

So me and my boyfriend moved closer to his best friend a few weeks ago. His bestfriends sister and him went out when they were younger, and about 2 or 3 years ago they did things while she had a boyfriend. My boyfriend flirts, not on purpose, all the time without knowing it. Even I do that. Should I be worried if he flirted with her? Or if i thought he flirts with her?