You may wish to consider disabling your profile rather than deleting it. Disabling will hide your profile from all members, but you'll still be able to log in and re-enable it at any time, (for up to a year). You will keep all your old messages, settings, saved profiles etc. Log in and go to this page. The enable/disable option is 1/3 of the way down on the left. Click save bottom left when you've made the change.
If you definitely want to delete now, log in and go to this page. the delete account link is at the bottom of the second column, on the right.