Boyfriend lying

My boyfriend lies about little things all the time and I don't know if I should worry about it or not... Like last night he got home at like 2am from hanging out with his boys and yes I know it was all boys. I know for a fact he left with like $25 and I asked him what he got because they all went to Dave n busters... He said he got a hamburger for free cause they messed it up the first time yaddda yaddda then I asked him if he drank and he said he had one drink and that's it because the weather was crappy so I said okay and went back to bed. This morning we were talking about going to mcds for breakfast and he said he might have a couple ones. So I said a couple ones? You said you got the burger for free and only had one drink so where's the rest of the money..? "The drink was expensive" okay how expensive "like $8" okay so where's the rest of the money...? "I had two icee drinks too" did the icee drinks have alcohol in them? "Yes" well thanks for lying to my face last night.