I dont know the whole story but I wouldnt give her the poetry, Keep it for yourself and lock it away.
Also I dont think the photo of both of you is a good idea either, If a male friend of mine gave me a frame with our photo's in I would think that real weird
I think a cute card, blank inside so that you can just write a few words on the lines of good luck etc would be ok and she can keep that without it being too much
I dont know the situation but if she likes you she will have you in her head already, material stuff isnt needed