Is AUTHOR wrong in the post ? POST : Of course from just the title the obvious answer is YTA, but hear me out.

I met this girl 4 years ago, when I was 19. I was still figuring myself out, since now I'm a confirmed demisexual type of person. I was never one to be with a random girl just for the deal of it, and can hardly even perform under those circumstances.

But when I met this girl I started to feel attracted to her. Not only did we share interests, but our emotional aspect was preety much on point. During this time she was single and so was I, and we even got to cuddle once. But out of my fear, I simply didn't do anything about it and we simply drifted away. She started dating another guy and once that happened we stopped talking all together.

Last month I had been going through a self discovery journey of sorts, traveling and meeting new people and decided to contact her again. We hit it off preety well and while we chatted I did my best to see if she still was single. The whole month goes through and no mention of a boyfriend nor while texting nor in social media. I know people that don't usually publish their personal relationships on the internet but she simply did not talk about it.
When I came back from my travels (about a couple of weeks ago) , we met again and I asked her if she was seeing anyone, at which point she states that she is, and with the same guy for 2 years.

I kinda fell apart and got distressed. And these weeks have been quite rough for me emotionally, only blaming myself for simply not acting when the possibility was real.

I am planning on telling her the truth, of how I still have strong feelings for her. I am not looking for her to dump her boyfriend, nor am I looking for a petty excuse to barge into other people's life, but I just can't live with all of this anguish inside of me.

I'll take advice AND any criticism. I truly feel like an asshole doing this but many of my friends agreed that I should be honest with her. (I'm incapable of lying. Even if I try it's preety obvious I'm lying) and I know she knows I'm depressed as hell, which is horrible when she asks what's wrong and I simply pretend it's a "random lol depression". 