is female dog compatible with male snake

First of all, the age difference will never be a problem between two lovers.
Well, for you and the male snake, frankly, you can cater to each other's satisfaction well, but it seems that you cannot preceed further. Both of you are decisive and confident, but you hold completely different life blief, which makes you separated in deep heart.
Anyway, if he is also into you, more communication and the mutual understanding can help to make your relationship harmonious so that you probably can get a promising future.