Lesbian in a long term relationship

I'd suggest continue being a friend to her and if she wants anything else to happen, she will leave her current relationship and make that clear. It does sound confusing though!

Update: we made bowling plans and she brought her girlfriend last minute. The next day, I told her they look happy together, but her response was "yeah we vibe. I mean, 7 years hasn't been for nothing" but she didn't say she loves her or anything. We continued to vibe out on an hour long ride home from work, talking about life and future plans to hang with each other. Thoughts?...note: I was thrown off by her deciding to bring her GF last minute, but I took it in stride and we had a good time.

This girl shows a lot of interest in me. We can talk for hours in person about life family and relationships. She smiles at me, leans in close while talking and pierces my soul with eye contact to the point to where I have to look away at times out of nervousness. I also catch her glancing at me in my peripherals all the time but she can barely can hold a conversation with me while texting. Shes also a lesbian who's been in a relationship for over 5 years (not happy). I'm a guy and don't know how to navigate through this. I like her a lot but I don't want to overstep and possibly lose her as a genuine friend. Does she like me more than a friend? Am I delusional? What should I do?

Best thing to do is probably sit down together and discuss with each other what you want from this.
Remember what you want and what she wants is two different things so trend carefully with how you handle it.
Maybe friendship to start with and maybe she'll go out with you for a meal, drinks, pictures etc or she might tell you straight out she's not interested in you as a man as she wants to be with another woman who'll treat and respect her.

i treat her with way more love and respect than her partner, but yeah. I'm just chillin until she makes things abundantly clear. She still drops hints but I'm not playing games. She's gotta make the decision to leave her before I even entertain her notions.

Yes definitely don't jump into anything until she has decided 100% about being with you in a serious relationship as she could easily be using you for a rebound to get reactions from her current partner. Hopefully she's not doing anything like that for your sake.
Play it cool and day by day with her and see what happens. Totally agree with you about her having to leave her current partner first before you entertain anything from her okay.
Glad you are trying to treat her better than her current partner as it shows her that you are being serious as well but you need her absolutely 100% commitment for yous to be together in a relationship.
Dropping hints doesn't mean much as remember what I said above about her using you for a reaction from her current partner.

Idk if shes using me. I'm a pretty objective thinker and I wasn't looking to have a genuine connection with her, but she's literally into everything I'm into and we share the same core values and talk for hours about anything. I've been in relationships with users and lovers and she doesn't strike me as a disingenuous person...if so, then she deserves to star in movies, straight up.