You could be bisexual and easily bored, or you could be bisexual and homoromantic (i.e. you’re attracted to guys and gals but not interested in romance with guys), or theoretically you could be lesbian if your dating with guys was more out of a feeling of obligation.
At this point, don’t feel that you need to label yourself. Just pay attention to your feelings and things will become more clear in time. Whatever orientation you are, your feelings are legitimate and you’re a valid person who deserves to be happy.