My ex-gf is interested again, I'm not
Remaining friends with an ex never worked out until a relationship that ended about a year ago. After a month had gone by we started talking again and hanging out occasionally, and were able to put the relationship issues in the past. A few months ago she got sent to another state by her company and has been lonely recently. There've been hints she's thrown at me that say she's interested in me again, and then recently I was chatting with her online and she suggested I buy a one-way ticket to her state, and then we could buy round-trip tickets to paradise. I was really taken off guard and while I can't remember my reply, it had all the tact of "wtf?!" I'm not interested in getting back together with her but would like to remain friends. What would be a nice, tactful way to let her know that I'm not interested? I've tried shrugging off her hints and even the "wtf" type response (though not intentional), but would like to be better prepared if it happens again. Also, from what I've written do you think we can remain friends or is this doomed?
Thanks, I appreciate any advice you have to offer.
Since time began
the dead alone know peace.
Life is but melting snow.
--Nandai