How do I tell my boyfriend I'm not comfortable with this girl in our class touching and flirting with him a the time if he doesnt see my perspective of the problem??? πŸ˜–πŸ˜–πŸ˜–

Ny
so this girl that ive known for a little bit keeps having small interactions with my boyfriend. shes kind of somewhere between totally lesbian and bisexual but i still dont trust it because she liked boys like 3 months ago. he thinks im over reacting when i get mad at her kicking him, play fighting with him, grabbing him and pulling him close when trying to get something, and all this other shit that bothers me so much but i dont say anything because i dont want him to think im some jealous over reactor that doesnt want him around other females because thats not what i want ughh what do i do??