Figuring out your own sexuality is hard, incredibly hard. A lot of people will want to label you, and as long as you're completely fine with being labelled then there's nothing wrong with that. You may not be so certain about a label, and others labelling may cause you to feel uncertain, pressured or uneasy.
Sexuality is a scale, it is not black and white. You're not either gay or straight, it's not even as easy as gay, straight and bisexual. I am bisexual myself, and the level of attraction I feel to either sex is not equal. I consider myself to be 60% straight and 40% gay in simple terms but it's really far more complicated than that, mostly to do with emotional and physical attraction. It's not easy to describe your sexuality without a label, but really, in today's society we don't need labels. You just do whatever makes you comfortable and happy, if you feel a label suits you, then use it, if you dislike labels, then don't. The choice is entirely yours, and all that matters is that you're happy and feel comfortable with yourself.