Hey congrats man, I'm happy for ya and don't question YOUR devotion for even a second. BUT I DO however question hers and here's why.
For 2.5 plus years she's been hanging with you, knowing full well you were dating, screwing other chicks and spinning plates. Apparently she was cool with it, no hassle. It might have even turned her on on some level, it's what kept her attracted to you and her V tingling
You gotta know this isn't standard from quality chicks who seek relationship and commitment no matter how much she digs you. Good high quality women don't hang around accepting that for 2.5+ years. She would have dumped you and sought a man on her own commitment-oriented wave length.
For example
@BeExcellent who I consider a quality chick from reading her posts, would you have been cool with that situation, the guy your dating/screwing f*cking other women and spinning plates, for 2 and a half years?
Again I don't question your devotion and commitment, you've reached a place where you're ready for it and want it.
The real question is how's it gonna be for HER now that the dynamic has changed and you're all devoted to her and ready to commit? How will SHE handle that transition? It's something I'd be concerned about. Have you thought at all about that?