What should I do about this girl I really really like?? Any advice?

Hi so ive know this girl for about a year and we were always freinds, never more, we didnt see each other too often but when we did we would always have fun with each other , shes just a girl that ive never felt like this about, i can be myself aroun her and just feel comfortable shes always laughing and smiles around me all her freinds like me too, anyways im now a Marine and I graduated from boot camp last friday ive been home on leave its been great, in boot camp she wrote to me and sent a paper origami swan in it and it made my day ill keep it forever, when i came back she told me how proud she was of me, and i told her we deff gotta hang out, so she texted me saying friday we should go to the movies would be god but shed like me to meet her parents, when she saw me she ran up and gave me a tight hug it was so great so i did and they were very very nice very happy around me they asked me questions about boot camp, her little sis was there too i also thught of her and bought her a bad of australian made licorice, because shes upsessed with the country lol we went to the movies and had a great time (of course i paid for everything) we really enjoyed our time with each other we joke alot i let her talk about her life and ask her questions and listen to everything she has to say i told her my boot camp stories lol, the movie was great and she kept saying how great it was and what a great time she had and i was glad, anyways i was wondering what should i do i leave tomorrow for 2 more months of training ill be able to bring my phone so i plan on calling her, i just want to be in her life because i think she knows i kinda love her even though i never said it she seems kinda sad that im going but i mentioned next time we shouldsee a baseball game together and she said of course im just very upset i have to leave her until the end of july any advice on the situation?