Difficulty: Moderately Challenging
Invitations
Step1
Accept the invitation graciously. Even if you do not like the person, or you know that you will not be able to attend the event, you should at least make the person who invited you feel as though you appreciate her consideration. Smile when she gives you the invitation and try to look genuinely happy. Saying something nice to her to express your gratitude is a good idea. Make sure not to give her any mixed signals such as a snippy tone or indignant posture.
Step2
Tell her that you may be able to come but you’re not sure. Even if this is not quite the truth, you do not want her to think that you are purposefully choosing not to attend by immediately saying that you cannot come. In order to prevent creating too much expectation, tell her that you would love to come but you're not sure whether you can.
Step3
RSVP within the time frame provided in the invitation. It is very rude for you to delay your reply until the last minute. Try to get back to her as early as possible to ensure that you will have been considerate to her in terms of planning the event.
Step4
Tell him that maybe the two of you can get together another time. This step is not completely necessary if you absolutely do not like the person who has invited you because it would compromise your integrity, although it is usually a great technique to ensure that the person who invited you does not take offense. This reduces harsh feelings because it shows him you are sorry that you missed the opportunity to spend time with him.
Step5
Ask how the event went the next time you see her if convenient. This is a nice gesture that will be appreciated as long as you are able to show interest and do it with sincerity. Once again this step is not completely necessary, but is a great way to wrap up how to politely turn down an invitation.
Novice 
