One thing I've learnt is that being too available to people isn't such a healthy thing. Humans can useeeeeee others fr! When they know you're the type that likes to give in, they'd want to use you even when they can handle it themselves.
That's a good habit Hopie, but sometimes, I'd say you should allow people to ask for your help before giving in and sometimes when they ask, and you're busy tell them you are. I've been there before, I'd rather leave what I'm doing just to do things for others. That's not a good habit.

A time will come when some will ask you if they asked for your help in the first place or you decided to help without anybody asking you to. Just take care of yourself.