i dont know how to feel about is

My long distance bf and i are in different states. We are together now and i was being nosey and on his phone. (Dont judge im just trying to be smart and make sure i dont miss something that he does ect cheating) Well my bf is shy. I have seen texts from multiple girls with him asking them to go to lunch/dinner at his campus. I dont know how to feel its always him initiating this. If we were living together and out of college wouldnt it be weird if he went to dinner without me (if i was working/had class) and with another girl??? I know he isnt too social but its always him and a girl not a group thing. Give me opinions please!!!! I cant tell him not to talk to people but i just dont want him to thing this is common. I feel left out/jealous because i wish that could be me and him but we are long distance. As a side note an old guy friend wanted to hang out with me this summer to catch up/lunch and my bf said he didnt feel comfortable with me going so i didnt. Im just so confused/hurt because i treat him so well and expect the same. I know my bf isnt a player/sleazy guy and im his first and only gf. It just doesnt make sense to want to be with girls alone when you have a gf. I talk to guys im not asking them to meet up for social reasons! What the hell do i do???