Dating services run mail and chat so you can get to know people in a safer and [monitored/controlled] way. Use their platform and the added security it gives.
If and when you do decide to share an e-mail address think about creating a separate and anonymous email address.
Take Your Time - Sometimes when you're excited about someone, your instincts can be confused by strong feelings.
Take care and take your time when you talk about yourself.
The Risks Privacy Maintain privacy and avoid identity theft or fraud.