Not to be harsh or anything but... when we are addicted often we don't realize when we are exhibiting bizzare behavior/thought processes. Are you sure that doesn't apply to you? What I am getting at is that your logic is flawed.
You say you are being turned down for your shape, but perhaps it has more to do with being an addict obsessed with his work? Or the fact that you are objectifying a woman as something to be there and comfort you, rather than a functioning human being..? (Smell her in the morning -snort-, have sex -mainline-, feel her on yor chest after -smoke-) You know what it sounds like you want?
A drug.
A person isn't meant to be an end-all be-all fix, nor is a drug. I am sorry to say but chasing a high, whether with drugs or relationships, will always lead to a crash.
Not to mention it is HIGHLY inappropriate to ask out someone who is working for you. Essentially you asked her to risk the paycheque you provide her and if things didn't work out her reputation within her line of work could be sullied as unprofessional.
Addiction is lonely. It changes how you think and see the world. Its good to work hard on your business, but if the only reason you do so is to attract a mate at the expense of your health. You said you made sacrifices, but were they to move towards your own happiness or to create a nest for some imaginary partner?
Don't give up hope. Focus on yourself! You have done a lot and should be proud. It sounds like you are overlooking all the good traits in yourself that allowed you to become sucessful. Don't get lost in that fog of depression. There are plenty of women and men here who have also been through pain and lonliness. You might not find a date, but I know here at the very least you can find friendship that is completely understanding.
-Best