Okay, so I'm gonna try and be as gentle and honest with you as I can....
A lot of highly ethical and reliable readers will not do 3rd parties or will briefly mention them, not do an entire reading focused on their relationship and your relationship with POI.
From my understanding that is mixing up way too many energies and it's extremely invasive and unprofessional for psychics to look into that and I question the success of it.
I've had a 3rd energy brought up several times, who is a male friend of my POI and he never liked me and wanted us to separate because my POI was the only friend in that group who was in a relationship and that person hated that I was getting the attention. They're both straight males and POIs friend has been caught out by me before for trying to split us and spreading false rumours. I believe they were brought up as they were and continue to be a problem in this case.
You can try and ask what the future is for you and your POI but seriously avoid asking about 3rd parties. You need to ask yourself if he gave you strong indications that he likes you and wants to be with you and the fact he is in a relationship with someone else is going against you. You need to realistically ask yourself if there is ACTUALLY a chance or if you're hyping yourself up and being overly optimistic. OF COURSE none of us know the situation like you do and I'm not here to judge.
Sometimes we just aren't meant to be with who we want to be, but our person is out there somewhere. Sometimes our messy situations work out in our favour, sometimes our hearts end up even more shattered. Just take the gentlest road for your mental health and your well-being. I'm always a message away if you would like to talk <3