I have been dreaming of snakes and my boyfriend as well. Idont know what it means. My boyfriends dreams are of them biting him on his legs and mine are of them chasing me.

It means you had a dream about snakes. Been watching many snake movies together? Anaconda? :)

(why did you post this in astronomy?? )

To see a snake or be bitten by one in your dream signifies hidden fears and worries that are threatening you. Your dream may be alerting you to something in your waking life that you are not aware of, or that has not yet surfaced.
Alternatively, the snake may also be seen as phallic and thus symbolize temptation, dangerous and forbidden sexuality. The snake may also refer to a person around you who is callous, ruthless, and can't be trusted.

As a positive symbol, snakes represent healing, transformation, knowledge, and wisdom. It is indicative of self-renewal and positive changes.

What does it mean to dream of a garden snake in the grass

Snakes in the grass, alas.

Capuchin nailed it. Means nothing except you may have a memory of a snake wandering around (metaphorically speaking) in your head.