The main sexualities are stated in the community name.
L - Lesbian
a woman who is sexually attracted to other women
G - Gay
sexually attracted to someone who is the same sex
B - Bisexual
sexually attracted to both men and women
T - Transgender
of or relating to people who feel that their true nature does not match their sex at birth
Q - Questioning
The questioning of one's sexual orientation, sexual identity, gender, or all three.
I identify as Bisexual.
Hope this helps.