What would you do, if you see your bf doing this??

I talked to my bf as i usually do. He was tired at the end of the day because of work and all because of which he was sending those one word text messages.. which was irritating me. Then we ended up saying goodnight to each other..and suddenly there was another message from my bf mentioning 'hhmmm..do you know any good girl'?? I was like what?? i called him up and angrily asked what was it?? He said he was kidding with one of his friends, which was hard to believe for me.

Next day we had a fight, he said u don't trust me. He was more angry on the way i spoke to him, he was like there are 100 other ways of sorting out a problem instead of yelling at each other. How can i be so calm reading something like this?? We are in relationship from past 2 years.. i don't know how to take it.. was it really a joke or something else??