To dream of a groom represents an assertive attitude about something in your life having to be permanent. Insensitive about anything wrong happening at before a big moment. You may be carefully considering or making preparations before a big decision. Receptive attitude for security or closure. Readiness for a new beginning.
To dream of being represents your heightened sensitivity or anxiety about a big decision or permanent choice. Not wanting anything to go wrong at all before an important moment. Alternatively, being a groom may reflect your anxiety about real life wedding plans you are making.
To dream of being shot at a wedding represents total failure or embarrassment while you waited hoped something was going to be permanent.