Snakes are regarded as sacred in a number of ancient / pagan religions. Even in the Judeo-Christian-Islamic tradition, a snake on a pole (the caduceus) is a symbol of healing. Yet snakes can also represent evil. So the dreamer needs to consider more information from the dream itself in order to interpret its meaning.
The snake in this dream is a large problem with which the dreamer is struggling in real life.
Nothing
A "red snake" would have different significance to different dreamers. The meaning of the dream depends on the tone and feeling of the dream.
The snake is representing someone that you know in the real world.
From my own understanding, snake means someone doesnt like you.
See a psychologist.
In this particular dream, the snake probably is a symbol for something untrustworthy or repulsive. Seeing the ex-boyfriend with the snake, it suggests that those feelings are associated with him as well.
its one snake
If that is what you have dreamed, don't worry about it. I can assure you, DON'T WORRY! nothing should happen.
From my understanding it means, that somebody hates you.
It probably means that you have an interest in gambling.
Without additional information about the setting and actions in the dream, it is impossible to give a reliable interpretation. In general, a hairy snake of any color is most likely a phallic symbol.