What to do about a lying boyfriend?

My bf and I went out for a few drinks last night but weren't really gettin in the mood for it so at half 12 he said 'do u wanna finish this drink and head home I'm not in the mood for this' (we live separately) so I agreed and he took me home telling me that he was also going straight home. He's lied about things like this before and I had a feeling that he would prob go to party with mates. I woke up at half 3 and rang him on private num to see if he did go home, but he answered and I could hear lots of people in background so I hung up so angry. It hurts me that he lied and he feel like he just wanted to get rid of me so he could do that, I haven't rang him yet for an explanation but no doubt hell tuen it round on me and make me look like the bad 1 even though he lied! We been together 2 years :(