Does this count as "Cheating"

File: images (1).jpg (23KB, 437x336px) Image search: [Google]

23KB, 437x336px

In a few months I'll be proposing to my high school sweatheart after knowing her all my life. I love her as much as one human could love another but last night I think I fucked up.

So we're both openly Bi but we would never act on these urges outside of our minds, but last night I got carried away and ended up dirty talking with a gay friend of mine over Facebook to the point where I made him cum by only using FB messenger texts (no photos). The stuff we were saying to each other was extremely similar sexting with my girlfriend. The whole time I was jerking off too but I was not into it as much as I thought. In fact I never outright said what I was doing, just jerking to his responses (basically half assed sexting). This was essentially my first gay experience with another person, if you could even count that.

Afterwards (and still to this moment) I feel horrible. As if I've cheated on her, like I've lost my sense of integrity and abused her trust. I acted on my curiosity and deeply regret it. I want to tell her but now I'm afraid she won't say yes when I propose to her later this year.

Have I fucked up? Does this count as cheating and should I tell her?

Just some notes: my girlfriend and I see each other and have sex frequently, we have never had a serious fight and are both comfortable with each other's sexuality. I've also told my gay friend how I feel and promised him this was a one off experience. He understands but is not against the idea of more.

TL:DR does sexting (text only) count as cheating?