Well, if you're sexually attracted to women as well as men, then yes, generally you'd be called "bisexual".
However, being sexually attracted to women is not necessarily the same as "checking out" good-looking women or getting aroused by "girl on girl" porn (and it's certainly not the same as "doing stuff" with other girls just to attract men).
Many heterosexual women enjoy admiring the beauty of other women. And what arouses you in porn or fantasy isn't always what you want to do in real life.
So the question is whether you actually feel attracted to and want to have sex with women in real life.
And you're the only one who can decide that. But there's no rush. You don't have to hurry to pin a label on yourself - just give yourself time, and your body and heart will tell you what you want soon enough .
We have some articles you might find helpful:
The Bees and...the Bees - A Homosexuality and Bisexuality Primer
Bi the Dozen - A Bisexuality Quiz