So my mate and his wife want to set me up with their friend. I am 27 English, the girl in question is 24 and from Latvia.

I bumped into her once in passing at their house very briefly but that is all. So my mates wife mentions me to her and shows her my FB, She says yes she is interested or something along those lines. She asks shall she add me, and my mates wife said not sure.

So this is got leaked to me by my friend, a few days go by (as was supposed to have some kind of double date which never materialised) So I got chatting to her on FB. Was quite brief but went well enough. I ended it saying I would like to chat more sometime and left my number.

She is currently in a 'complicated' relationship which according to mates wife she is desperate to end and she herself told me she wants to end it. (I didnt know about this relationship when I first messaged her)

She hasnt text or rung since then, been a few days. What do you think the best way about this is?

She is very hot so its something I want to persist.

Should I message her again and risk seeming desperate?

Should I wait it out for her to contact me if/when she does?

I figure maybe I should let her sort out ending this complicated relationship she is in, but at the same time if i keep my distance maybe someone else will snap her up

You should have called her to begin with - then you wouldn't be asking this question - because you'd both be on the same page and she'd have given you a yes or a no...

Lesson to be learned here.

You already had assumed interest (ie a setup). Always call if you can... You get a WAY better sense of whether to waste your time, and her interest level if nothing else.

As for what you should do right now - yes it's desperate to continue messaging. She knows how to contact you and knows exactly why you've messaged her in the first place.

Game others. This one may come back to you or may not.