I really need help with this guys please help

am new to all this and I am not sure if I am posting in the right place. Just want some advice and what people’s thoughts are. I hope I can make sense here goes: I have been separated from my Husband for well over 2 years. We have got on well for the sake of our children, there is no way we would or will get back together. He has started to date again and I have been looking at online dating agencies. I don’t think it is going to work for me, as I have a few illnesses and no spring chicken or size 8 anymore. The thing is I have found myself starting to have feelings for my GP. I am there quite a lot and we have a great relationship and he understands me, my illness and my situation at home. Not only is he a great GP he I think is quite high on the Asperger’s spectrum which I don’t mind. I know that patient Dr can never have any sexual or romantic relationship, I would however change GP if this was something that would turn into something. I am stuck between a rock and a hard place. He lives in the same area as me and occasionally see him about. He is single with no children as far as I know. Just don’t know what to do HELP