I've been with my partner seven years and we've spent most of that time trying to have a baby. Sadly, despite lots of treatments, we haven't been successful. This has had a big effect on our relationship and now I feel he's more a friend than a boyfriend. Recently I've got back in touch with an ex and it's made me realise how much I miss the spark. My ex wants to marry me and start a family - I'm very tempted.

Susan advises
I really understand the pressure you are under right now. Coping with infertility takes a huge toll on couples, and it's absolutely understandable that you and your partner are wobbling and that you're tempted by the 'spark' you had with your ex.

But what you're thinking of would be a total mistake. You're in no fit state to succeed in another relationship right now - you're far too vulnerable. You're also in no fit state to succeed in a relationship with someone you failed with before; unless something has seriously changed between you, getting back with your ex will end in tears.

Thirdly, what about starting a family? It isn't clear from your email whether it's you or your current partner who's had trouble conceiving. But if it's you, then there's no guarantee that you can conceive at all, and if it's your partner then you are switching men simply in order to conceive - and that's never enough to keep a relationship together.

Please see a couple's counsellor to try to get your relationship back on track. Yes, if that doesn't work you may part. But at least you'll then have the counselling support to part without too much pain - and to make a good partner choice next time round.