I don't think the disappointment is avoidable if she is looking forward to it.
When we are in the same situation as you, we just say it to each other. Of course sometimes there is a disappointment, that's just natural, but we are not mad at each other or anything like that because we love and care about one another.
You should know your gf best so you should also know best how to phrase it. If she cares about you and how you feel, then there shouldn't be big issue.
J0hanNmonster t1_j2fu3wm wrote
Reply to comment by ishouldvoicemario in [28M][25F] How do I tell my girlfriend I don’t want to go to a party tonight? by ishouldvoicemario
I don't think the disappointment is avoidable if she is looking forward to it.
When we are in the same situation as you, we just say it to each other. Of course sometimes there is a disappointment, that's just natural, but we are not mad at each other or anything like that because we love and care about one another.
You should know your gf best so you should also know best how to phrase it. If she cares about you and how you feel, then there shouldn't be big issue.