<human>: I've been with my boyfriend now for 7 months, and we had been going through some rough times over the last month or so. I have discussed my feelings about our relationship with him, and we've both made some changes to our relationship, and I feel like things are going a lot better.

However, about a week and a half ago, I was upset with him and had been drinking. I was hanging out, alone, with a friend of mine that I have had feelings for for a while. We ended up making out pretty intensely, but no clothes were removed or anything.

My boyfriend had previously had suspicions about something going on between this friend and I; he clearly knew that my friend had feelings for me. 

Now, I'm pretty overcome with guilt when my boyfriend says I make him happy and stuff, because I feel like I'm lying to him and that he loves me without knowing that I totally betrayed his trust.

If I tell him, it'll break his heart, especially because it was involving someone that he had already been suspicious about, and I'm not sure if it is worth all the drama when me and my friend just made out. But, I feel like I can't keep letting him think that I'm trustworthy and faithful when I clearly fucked up.

Any advice fo how I should approach this?

Give me the gist of the text in a nutshell
<bot>: made out with a dude that I had feelings for, my boyfriend was already suspicious about something going on between us, not sure if/how I should tell him.