Hi Sara,
What you would like to do would require javascript which is not supported by most email clients. You can use generic code from the various social networks to pop up a share in a new window, but there's no share tracking because it's not our application.
You may find these links helpful:
https://dev.twitter.com/docs/tweet-button
https://developers.facebook.com/docs/plugins/share-button/
https://www.facebook.com/sharer/sharer.php?u=www.replacewithdomain.com
https://twitter.com/intent/tweet?text=
Please make sure to have access to an experienced developer.