<human>: I've been with my boyfriend for over a year now. We're both in our 20's. I love him very much and I feel that he's the one I want to marry and spend the rest of my life with.

About a month ago, we started talking about having an open  relationship. I told him what my rules for him was, but we didn't discuss the rules for me. In the last two weeks, I've become interested in hooking up with a friend, and I told him about it.

My boyfriend isn't the type to be jealous but he did seem a bit hesitant now that I actually had a physical partner I wanted to sleep with. We talked a lot about it.

Today, I met the friend and ended up giving him head. We didn't have sex.

I told my boyfriend immediately after, and he was very upset. He said that we hadn't come to an agreement about our boundaries and rules. Plus, he expected me to clear it with him before going ahead with it.

I realized my mistake as soon as he said it, and I felt terrible for letting my lust get in the way of our relationship. I've broken his trust and it'll take a long time to get it back.

He told me that I've made a really bad decision, but he loves me. That's the first time he's used those three words because he's usually too shy to say it.

I feel so awful for hurting him. I can't imagine being without him.

Can you condense the text into three sentences or less?
<bot>: I slept with another guy, thinking my boyfriend was okay with it. He wasn't and I've broken his trust.