well I figure I could use some advice or tips on this so bare with me all

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I just move to a new town not too long ago (couple months if you really wanna know) so im new where I live, trying to get to know my way around, make friends, make a new life for myself.
Well theres this girl that moved in the same neighborhood as mine 2 houses down from me.I always thought she was really cute when I saw her and she lives with her mom, I have talked to her mom a couple times and her mom is really nice and seems to like me. Shes also a year younger than me. Well I never really talk to her (the girl) till today when she was walking her dogs and I was outside getting a piece of gum from out of my truck.
Well I started talking to her and we had a pretty good convo for the first time since we never spoke before since she and I moved in this neighborhood, well I found out she has a bf still from where she used to live (which is like a hour or 2 from were she lives now) but I still asked her if she would want to hangout sometime. She said sure when shes not busy and told me to "keep in touch".
Now my sister always told me to talk to her everytime I saw her and she was around cause she knew I liked her, so I told her that I finally talked to her and also mentioned she said she had a bf which did bummed me out a little but not much. She said don't get so worked out over it if she is still willing to want to hangout with you, cause you never know since you live here and he (the bf) lives there.
Anyways long story short, I wanna know....Should I hope that this friendship that is devoloping here could and might become something more or just know we will always be just friends? I don't wanna get myself excited over what my sister said so im asking you, the people of TFP to help me on this.
So don't feel bad if what you say is not what I want to hear cause I want all of your honest opinions on this, thanks for your time for reading this and I can't wait to hear all of your guys and gals replies

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