I befriended a girl like that. She was unreal! She used to impose on me the same way. Coming over with her 5 year old daughter for dinner one night. Then asking me to drive her for smokes and then talking me into going for one drink which of course turned in to many! Meanwhile leaving her daughter asleep on the couch, my kids in their beds and my hubby sleeping too.
I couldn't get her to leave the bar! Then she picks up this guy and and asked if we could drive him home. I reluctantly agreed. Then she wanted me to leave her with him and leave her daughter at my house!!!!!!!! UGH!! I couldn't believe this chick! Finally, I got her to come with me and when we came back in my hubby was sitting on the couch with her daughter madder than hell! I didn't blame him!
Soon after that she called me and wanted a ride to the airport! I said I'll be right there and I was never so glad to get rid of someone in my LIFE! She moved back with her old BF.

</font><blockquote><div id="quote"><font class="small">Quote:</font>
But this woman is not worth hanging around with. Its not a friendship at all. I just am not sure how to say this to her without hurting her. I don't like to hurt others and am not sure how to put this delicately.

</div></font></blockquote><font class="post">

Don't say anything just make yourself unavailable. Get yourself involved in something that keeps you occupied. You simply don't have time.
Just keep saying no. Have a list of things you are doing next to the phone that way you wont have to think of excuses. And if that doesn't work pass the buck and say your BF wont let you hang with her.