Do I tell her how I feel, or do I just move on? Please help?

if she means enough to you tell her how you feel, tell her you will skip this trip if you and her both promise to put 110% into the relationship if she means enough to you then the trip isnt worth it. My gf started off tellling me the same stuff she tells you and we couldnt be anymore in love... so thats my advice good luck buddy!