I am a snake/cancer female and like a dragon/sagittarius.

Selena, it's true that Cancer and Sggitarius are not very compatible. Their compatibility rating is just 40 percent. Cancer is reserved but Saggitarius is always freewheeling. However, there is still a solution. You both shouldn't try to change each other. Instead, you should reserve your differences. Meanwhile, you should try to make everything clear to him. Don't let him feel suspicious.