I have very high expectations for "real life" friends - and when they don't fit in with my expectations - of honesty , loyalty & trustworthiness, etc - I pretty much stop spending time with them.

I give emotionally up to a point, but if it becomes all one sided after awhile I draw the line.

Life is too short to waste by feeling used or manipulated.
Don't be afraid to say no to those that are using you.