This is long, but I would love your advice

Okay, so I may have went to a bar by myself last Friday night because everyone was being lame. So of course when drunk guys see a girl alone it's like they're prey. So guys were coming up to me all night. So I'm in the process of hiding from this creepy guy and another one comes up and asks me what I'm doing hiding behind a pole. So I explain why and he asks me to dance, and I don't dance, like at all but somehow he convinces me too. So that Saturday he wants me to either come to breakfast with him or golfing. To both I denied. Saturday night he said he was at a friends house having a bbq and I should come over. So i did, met some of his friends and then went home. Next morning went to breakfast with him. Came home and did my homework, then he wanted me to come to his friends sons birthday party, so I did. And then we went over to the house I first went to and helped them build a bunk bed for their son. It was so sweet. SO then we go back to his place and fall asleep watching a movie. So then I go home. Then he wanted to have lunch monday but I couldn't so we went to dinner Tuesday night, went on a couple errands and back to his place for a movie. ONce again fell asleep I mean he plays with my hair the entire time, how am I not gonna. So he asks if I want to stay over and I did. He doesn't try anything at all. We wake up early and he takes me home. And now he just texts me saying my pup and me are always welcome over there. Like I can't explain how sweet this guy is, I've not once opened his car door, he always opens it. I've never experienced all this before, its all been jerks. Unfortunetly, he is deploying next week. So I asked him whats gonna happen and he said it was on his mind too and that he didn't plan on meeting someone like me but he did and he wants to spend time with me and learn things about me. And I am just about head over heels for this guy already. I can't stand how much I already like him. So i guess my question is what do I do? I just don't know, like he literally leaves next week. Any advice?

Help us out here..How old are you? Is there a big age gap between you? How long will he be gone for?

I'm 21 and he's 26 so no not huge. He'll be gone for 9 months, so until November