Expiration date nearing

To put it bluntly I am 40 yrs old, apparently an attractive and intelligent guy, cultured and well traveled. Been on too many dates to count over the past 2 years but have lost interest in meaningless sex and meaningless relationships, the thought of continuing on this course for another 20 years just brings me to my knees in absolute pain and hopelessness. The people around me have their own problems and wouldn’t want to hear about my bullshit pain so obviously I can’t open up and tell anyone how bad it has gotten without burdening them or being called mentally ill. What I don’t need is to be told the same old myth “give it time”, “you just haven’t met the right person” because those aren’t answers  and they certainly don’t numb the pain. Ultimately who can really answer the question of when will it happen, how much time do I need to give it, “as long as it takes” implies that I can cope with the pain indefinitely which I can not for much longer. If marriage and children aren’t in the cards for me then neither is a 41st birthday, it’s just as simple as that! I am not asking for pity just speaking my mind, I’ve had a pretty good life and have been exceedingly lucky to have loved and been loved by some wonderful woman, got to see the world and have many interesting adventures. No I don’t hate myself I’m a very decent and loving man but I’m not lucky in love nor strong enough to battle through another decade childless and alone, at this point I’m probably in too much pain to ever find love again anyways =) My problems are very very minor compared to what others are going through, unfortunately my pain is not and obviously deep down I must be a fucking coward.