<human>: Can you succinctly summarize the text in 1-3 sentences?

I had a previous relationship with a girl. My boyfriend knows about this, but it was a weird topic for a while and I was extremely nervous that letting him know the details would create issues early on in our relationship. Since then, I've come to trust him a heck of a lot more, I could honestly tell him anything with confidence. But today, I made a joke which made him wonder about it, so I told him that I had in fact kissed and made out with my previous girlfriend. This hurt him because he said that I told him point blank earlier in our relationship that I had never kissed her before, and had very strongly kept that assumption up. He says that our relationship doesn't bother him at all, but the fact that I lied to him. Morality is extraordinarily important to him. So my question is, how do I help to make things better?
<bot>: I lied to my boyfriend early on in our relationship, the truth just came out. How do I make him feel better and fix our relationship?