I think you should definitely forget about the lady in Germany. I doubt you want to live there and I doubt you want her to come here and support her. Can you salvage the relationship with the woman you're living now??

Regarding your sexual dysfunction - this is a common problem at your age. Have you discussed this with your doctor. Please speak with your doctor about this - it could be a treatable prostate problem. There is hope in that department. Are you on medication for your depression? If not, please discuss this also. Being in a relationship isn't the be 'all and end all' - plus you can't form a healthy relationship when you're depressed. The 1st step is going to your doctor and don't feel embarrassed about discussing the sexual dysfunction. Your life isn't over just because you don't have a partner.