For being so accomodating
Take your time to get to know him before you start being all about him and his needs.It’s fine to be intrigued — like you’re on the verge of being interested — but don’t let yourself get totally sold too fast.It's counter-intuitive for some and obvious for others, but people will value you more if you are less available whereas they will treat your time with increasing contempt if you can be reached and interrupted easily.With this reputation in place, people are much less likely to try to trick you into doing what they want, and more likely to try to get you to do things with them. If you don't have much social capital to begin with, it could backfire into being ignored altogether.Meaningful interactions are risky and costly and modern people have lost their nerve.
One method I found works disturbingly well is to have a busy life or cultivate the appearance of a busy life.
Us women want men to say and do nice things for us all the time. In the beginning, when you’re just getting to know each other, guys need to feel a bit — just — of distance between you and them. Because what fires them up is the challenge you present. By creating the opportunity for the guy to chase you, you’re not being mean, or stingy, or doing anything terrible — ask any psychologist and they’ll tell you that men generally respond best to women who behave this way because they need to feel like they hunted you and won you.
Turns out that’s actually not what dudes want, at least at first.
Even if you are lazy and simply don't want to help right now, remember that this laziness also fulfils one of your needs - probably you need to rest or think.
ADDED: Telling people that you just cannot help _right now_ also softens the blow.