Hi Jeanette.
Sad to hear you are feeling so down about this. As they say, you never know what is around the corner if you stop walking so keep your chin up and stride on!
I have a mate who has just turned 41. She is 'still' single, lives alone and often dreams about meeting Mr Right and having kids. While she is 'looking' she fills up her time with lots of hobbies, travelling etc. She hasn't been short of boyfriends as she has met lots of blokes through her travelling and hobbies..it's just that she hasn't met the right one yet. She isn't sad about it..yet ;o)
So my advice to you would be to get yourself out there, there are lots of things you can do and places you can go in order to gain a social life ~ dancing lessons, a bowling team, Rotary club etc...it may well fill your time up so much that you forget about meeting a long term partner because you are enjoying yourself so much..and if he DOES come along you will be hard pushed to notice..lol.
Good luck & take care :o)