You like that person very much, and if you want others to give you more promises or hopes, you will have this ambivalence. According to Freud's psychological theory, dreams are a kind of satisfaction to make up for reality. You always want to contact her. You always think of a reason before each contact, but it always ends in failure. So you had a dream and gave you an impulsive, merciless and unreasonable reason, forcing you to contact her on your own initiative.
Go and contact her, even if you can't say why, it doesn't matter if there is nothing to talk about. Girls don't really care about this rational causal relationship. Or tell her your dream, maybe she will be hot for you for a while.
But judging from experience, you will fall in love with that blind date in the future. It's up to you.