I don’t know what to do. The right place, person and time.

lately I’ve been thinking about doing something very stupid. I’ve been dating my GF [20F] for coming up to 5 years now ( myself being [18M] ). My GF has helped me through a lot, like my grandparents and mother passing, my drug addiction and helping me change to become the person I am today ( this being the most important to me ) and i couldn’t love her and appreciate her more than I already do.

As of recently I’ve started my new job - been there for about a 2 months. For about 4 months Ive found myself feeling that mine and my girlfriend’s relationship is getting… stale. Boring. Autonomous. There isn’t that passion or love just the title of being “together” on top of this we argue about 2 times a week. It’s draining it feels like I’m married. I’m 18 and I want to be free, have fun and do shit that I want to do. - this would be the “right time”

Back to my new job - the “right place” - I’m now a waiter, a little gig, didn’t expect to be there long just to help get a bit of money for my car whilst I’m in college. Whilst I’ve been there I’ve met “Kim” [19F]. - the “right person”. She is something out of a fairy tale, a beautiful soul, bubbly personality, same interests as me same beliefs and as motivated as i am, she the kind of person who if you had to chose anyone who you’d have to spend a year JUST with them - it’d be her. I noticed she started flirting with me, so I flirted back and in short I’ve ended up asking her out on a “date” which yes I know I’m in the wrong to do so. I have STRONG feeling for “Kim” the kind of feelings where they are constantly on your mind and your dreams and I don’t know why. my GF has no knowledge of “Kim” and “Kim” doesn’t know I’m in a relationship.

The thing is though I do love my GF we have been through so much together and I don’t want to loose her, selfish I know, but I feel my heart and head wants “Kim”. I feel like I’m just scared of Change, or it’s the fact I don’t want to change? I don’t know what to do or how to even go about doing it so anyone’s input would be greatly appreciated. Thank you for taking the time to read.