Assuming both you and your friend have verified PayPal Accounts. The process is quite simple. You friend uses the Send Money feature and using your email address sends you the money. You will get an email notification that someone has send you some money. PayPal will then deposit the money into your PayPal Account Balance. You will also have a record of the transaction in your PayPal Account Transaction History.
Delays on receiving money can be for various reasons, not having a verified account, the funding source used by the sender, etc. For example, if the money was sent from a bank account, it can take up to 4 days for your to receive it.
Note, if you did not receive an email notification, one possible reason would be that your friend used an incorrect email address. If the status of the transaction on your friends side says "unclaimed", this means that the money was sent to an address other than yours.
As this is a member to member help group, no one here can look at user account details or transaction information. All we can do is suggest that if you have additional questions, you should contact customer support with your concerns.
