I have a gf but i have a crush ont the girl a couple doors down

So I been with my girl going on 7 years, my high school sweet heart. We've had a lot of ups and downs through the years but we still here. It's not the best relationship but it works (sometimes) and I love her. So sometime during middle school right b4 high school this girl moved a couple doors down from my house. She's a cute girl but I'm like 2-3 years older than her so when I was in highschool she was like in 8th grade.you know a little to young for me then. For a while I'd see her outside but never would say nothing other than a hi and bye. But after living there we got cool and talked on the regular. She got to know my mom and got pretty cool with my sister. She started coming to my house asking for me to come outside and wed just sit in my car or on the porch and talk. She was funny as hell and cool as fuck. We had a lot in common. Eventually my girl gotta a little jealous because she felt the girl like me, which she did unbeknownst to me. But I ain care she was to young for me any way and I just couldn't see her like that but she was cool n it was cool having a female FRIEND. So I fell back after my girl started getting mad. And the girl a couple doors down slowly stopped coming to see me and like a year or two later she got a bf. but by this time I graduated went to school for 2 year came back and now I'm working ,she to graduated but while I was in college. So from time to time I'd see her outside but we don't talk ,just back to hi and bye. Although now she no longer looks like a girl, she's a woman now, probably turning 20 this year. And she's fucking gorgeous. So by chance if we do say more than hi and bye, it makes me feel some type of way.She makes me feel some type of way sometimes. She's still the same goofy,fun,jokester I met back then. But I know I gotta girl and she deserves the best. So I try to keep my distance. Now to present point. She just came back from college for the summer. She and her bf from high school are no longer together. And it seems she talks to me more now. One night she actually stopped and had a conversation with me AND MY GF! I was as non chalant with that conversation as possible lol. But yea she does little things as if she just waiting on me to come get her. If she outside n I don't notice her she gets my attention. If I'm walking my dog n she see me way down the street as she walking in the house she would wait at her front door as if she still unlocking the door. You kno just doing little subtle shit to be seen. And I can't lie sometimes I do it to her to. I like this girl but I love my baby we just got so many issues and I feel like I done messed up with her so many times I feel lik it ain't no coming back. And the fact this other girl that likes me and I gotta little thing for her doesnt make anything better. My girl knows I like her. I've never told her she just knows. But it's like she pushes me towards this girl. "Look at how cute she is today" , "there goes your gf" , "why is she so pretty" , "why you never get with her" , "if I was a guy id talk to her". Shes making light of the situation but she assisting a potential threat. Idk what to think or do. Right now I'm just going to continue my relationship with my girl but I can't help but wonder about the what ifs. Fuck Utah and all these beautiful and confusing women out here 😫