He lied about his body count

When me and my boyfriend first got together he told me he had been with 16 girls.. I made him get tested before we did anything and I always felt really self conscious, he'd tell me where he's done it and tell me stories but I liked him a lot so I got over it. He then told me he lied and said he hadn't been with anyone and just wanted to feel "cool". And now he's telling me it's 2. I'm more mad at the fact that he's constantly lying and making things up. What would you do?