And on todays episode of "why surprising someone with an obligation they didn't already explicitly tell you they want is a bad idea"...

&gt;(long story) 

Yea, if you want relevant advice, don't leave out relevant details.

Why do you think she doesn't want to go with you? Have you talked to her about her lack of enthusiasm? It wouldn't hurt to know ages either. This has a few hints of someone (you) being interested in the other person (her) and her not being interested back. Is that what's going on here?

Generally it'd be a better idea to go on your own with someone else than to just give off the tickets, unless they were a birthday gift or something, in which case they probably shouldn't have come with the obligation to go together in the first place.