What to do...

So yesterday was my roommate's birthday. So I made a yummy cake, with ice cream in the middle. Another friend and I are having a party for her tonight (which has been a big kerfuffle- I wanted it to be a big shindig for her at our place, with a fun theme- he changed it after I sent out the email so now it is a combined party with his roommate at his place with no theme), so I was going to give her the cake yesterday. She said she had a meeting after work and would be home at 7. Another friend was over working on a project with me so we were all ready with candles in her cake, camera ready, lights off, waiting for her to walk in the door... she never came. Our friend left, the cake went back in the freezer, I went to bed. Right when I turned out my light, my roommate came home. I was too tired to do anything, and I assumed she had gone somewhere to celebrate. Well this morning I find out that her meeting was cancelled so she went to work at the temple (as she does every thursday- except when she has meetings). So I thought I would take the cake to the party tonight- then I find out that the friend hosting the party, bought a REALLY big chocolate cake. Now I just feel DUMB! I don't know what to do. Do I tell my roommate that I had a little something planned for her but because she came home late, she missed out? Do I bring the cake to the party and have WAY too much chocolate cake? (and take the chance that it will melt all over). Or do we eat it on Saturday? I am just sich a fan of communication and it frustrates me when people don't. I guess I didn't communicate to my roommate that I was having a little something for her but I did ask her when she would be home from her meeting... I like to keep somethings a surprise! Anyways... I will figure something out... it just makes me sad that I had BIG plans and they have all been smooshed!