About me and my boyfriend?

Hi guys! The thing about me and my boyfriend. Well we have known eachother for 9 years. Been in a relationship for 2 years this month. And boy we had our ups and downs. Still to this day we do and a lot. I love him so much. And I know he loves me but I need advice from you guys to help us not fight so much what can we do? Im not going to lie I do complain a lot but the only reason why I do it is only because he does things that are not so cool. Ok for example it was me, him, his guy friend, and his friends girlfriend. Ok I was barely introduced to this chick. and we where at a car dealer ship cause his friend wanted to buy a car and my boyfriend was going to co-sign for him. ok story short. So my boyfriend gets up leaves the room and then comes back but that other chick that was there he passed right next to her and he lifted his butt faced it to her face and made a fart sound. OMG I was boiling inside. I couldnt believe that my boyfriend would do that to another girl that I barley even know her. so I waited patiently till we left and I told him about what he did and how I felt about it and you know what he says. OMG Erica you get mad for the stupidest things I swear to god. NO HE DID NOT JUST GO THERE. So I got super pissed and we argued that whole night. I mean seriously I barley know this chick and think about it what if when he did that she accidently hits his ass. OK now that would have made me be somebody that im not. well anyways I mean to me that is my ass and only mine. you know its not for him to be playing like that with other girls even if they are his friends girlfriends or his brothers. I felt like he disrespected me there and I felt like I had no say so in how I felt cause it did not matter to him. until like the next day he could not handle us being mad at eachother so we talked. but it still botheres me so much. why is that?

Seriously CHILL OUT! it sounds like your boyfriend has to walk on egg shells my god! fair enough you dont no this chick but he does, and she is HIS FRIENDS girlfriend! why do you feel threatened? if this girl is going out with someone why would she feel the urge to slap your bfs a$$? and she didnt did she? so who cares! why did you feel like you had to argue all night? you need to losen up or you are going to push your boyfriend right out the door!

yeah chill out erica! I think your making a too big of deal about that... I love you tho..

wow are you kiding I am with your boyfriend that's no big D just chill and laugh with him trust me it will be fun!