All help appreciated?

Me and my boyfriend have been together for 3 months and he cares alot about me but when we go out i'll be holding my hand or giving me a piggyback and girls are always checking him out but he doesnt even look at them, but it bothers me knowing that ppl are checking him out he always tells me that i'm his one and only which is good. What really bothers me is when we kiss and hug all the girls give me dirty looks. And once we ended making out in the movie theatre and ppl started throwing popcorn at us but How can i get rid of the jealous feeling and the dirty looks?