Im just wondering does this make you bi sexual?

So Im been with my partner who is male for 8 years.
Before that I always been with men accept for one which was a girl on a online relationship.
But the online girl relationship, I was going to a all girl school and I was accused of being gay by one girl. Turns out she is gay or bi.

Anyway I find myself looking at lesbian porn.

I noticed there this one actress who is lesbian but dresses kinda like a man but not, more punkish,rock. But I like her style.

I dunno. Can someone help me?
I brought it up with my therapist and I kinda got a vibe he didn't like it and said would you leave your partner to go with woman? I said no and then he said "It doesn't matter"