Sorry for taking so l long to answer. I wasn't ignoring you, I'm just not on here very often.
So, demi-sexual means that I need a romantic connection to someone to want to have any kind of sexual interaction with them. I'm attracted to people, even lust after them, but I don't actually want to do anything about it unless I feel connected to them on a more than physical level. But I also have social issues and don't like to be casually touched (like at all) by anyone I don't feel an emotional connection with, even if it's platonic.
Gender-fluid means that my identity isn't static. I identify as different things at different times. Sometimes one particular label lasts for months, sometimes it can change after only a day or so. Sometimes there will be a specific trigger, other times it just happens.