Me (30M) withmy fiancée (26F) of 3 years. We've been living long distance for about a year and a half. I've been struggling with loneliness and boredom issues. Every once in a while it's been tempting to flirt with other women(24F). The other day I almost kissed another girl.

Title should read as:
Me (30M) with my fiancée (26F) of 3 years...The other day I almost kissed another girl(24).
Sorry English is not my native language.
Being in a long distance relationship has been causing a lot of issues, and we now argue more often than before.
Let me also first say that I truly love my fiancee, and I have made up my mind that I want to live with her forever. She's perfect for me, and I really have no reason to destroy our relationship.
Lately, I've been struggling with boredom, and loneliness due to not being able to see her every day. It's been so tempting to flirt with other women, and sometimes when I meet other women, I'll start getting excited and I start getting those butterfly feelings in my stomach.
The other day I went to the bar with some friends and one of the girls that was there was starting to flirt with me a lot. She even started dancing with me, and to be honest, I really liked it. I missed having that physical touch I got from my fiancee. After a few drinks (BTW I'm not blaming alcohol on any mistakes I made but I'm mentioning it for context. I'll also say that I do feel like it affected my decision a bit) I decided to call it a night. She then said we could share a cab home and so while we were waiting for the taxi, she looked at me with eyes that said "kiss me." I was actually really in the mood, and I went it for a kiss when she stopped me. She told me that it wouldn't be a good idea since I had a fiancee.
The next morning I woke up, and my first thought was "****, what the hell was I thinking last night?" I was filled with complete remorse for attempting to kiss another girl. I then called my fiancee to tell her how much I loved her.
I then called the girl from the night before to tell her thanks for stopping me from doing something really stupid. She told me not to worry about it, since nothing happened. But I still feel like something did happen.
I want to say I've learned a huge lesson from this.
But I can't stop thinking about how i became so weak in my loyalty. My entire life I've always looked down on people who cheated, and I always thought of them as less intelligent human beings who have absolutely zero self control.
And I almost became one of them. If that girl had let me kiss her, things could have definitely escalated, and I would have carried this guilt for the rest of my life.
This would completely break my fiancee's heart. I don't want to break her heart, and I don't want to ruin this relationship.
I'm not asking people here to just **** on me and say "you're a ****ing pathetic loser/cheater and you don't deserve to have this girl!" because I see these kind of responses a lot in this sub, and I probably would say the same thing, but now I realized that I don't have the self control I thought I had.
I know I'm pathetic, and I recognize I have the same weaknesses that I myself accused others of having. I honestly didn't think I would end up doing something like this, and I have completely surprised myself and I'm disappointed in myself to say the least.
TL;DR: almost kissed another girl the other night and it has made me self reflect on my own weaknesses as a human being, and causing my to feel complete guilt.


Source.