Help me!

So, yesterday my boyfriend had told me that he lied about how many people he's slept with. When we first started talking he told me he had slept with only one woman but last night he told me he lost his virginity to me. I'm glad that it was me he lost his virginity to, but I'm upset that he lied and took two years to tell me the truth. How would you feel if your SO did this to you? I'm very confused about my feelings right now.