If you are in love with more than one person, and can imagine yourself happy in a relationship with them both at the same time, and want this to be honest and transparent for all involved, then yes, you are poly.
Poly can very easily mean a specific situation with specific people involved.
But why worry about labels? You are who you are, and are facing some of the standard issues that poly brings. If you find discussion useful here, then by all means join in.