http://www.compatiblelives.com/
I agree with your family: you are setting yourself up for a disaster. He is living with someone and if - and this is only an assumption - the relationship is not flourishing, you are setting yourself up for a great disappointment. Why not look for an attachment in your own world, the world you know and function in. You do not indicate where you live but certainly, like anywhere, there must be many places where you can meet men.
Thanks for your comments. It's made me realise what one of the problems is. I'm from the UK but my Mum is from Sweden and moved back a number of years ago. I have also since moved here and feel unsure of myself dating in this country. Unfortuantely my dating experiences here haven't been successful. My attempts could be summarized as men being interested in me but me not being able to reciprocate and vice versa. I think my old boyfriend contacting me makes me feel secure in the sense that we know each other. Dating feels a bit daunting. One of my colleagues went through a harrowing break-up and altough she is back with my partner, I got very dragged in to their situation and lost my faith in the potential of a healthy relationship for myself. Do you think I should explain to me ex that I can't meet him as he's not available?
Yes, absolutely. To show your independance not only will earn you respect but, at the same time, will make you feel that you are in control of your life.