Hi HopeUK, It sounds to me from your last post that you are now very clear in your mind as to what has already happened in terms of creating a potential relationship, and are realistically aware of the two-sided coin of scam/genuine need - you have decided that it needs to be given a chance - so go give it a chance and dont dwell too hard on the 'what ifs' - after all 'what if you never gave yourself a chance to find out for sure'.
I nearly let rational thought and practical problems stand in the way of my heart - its never going to be plain sailing in a relationship of severely unequitable finances, there's different paths for dealing with this for us all - i think you have chosen your first steps, so start enjoying planning for your trip with your 'eyes wide open'....