Dating a soldier? shall i or shan't i? please help asap...?

my friend's guy introduced me to his friend about over a week ago. his 22 and in the army. we started off txtin then finally met and went out on a night where he bought drinks all night and we danced like we'd known each other forever. i kissed him that night. being a girl that's been hurt many times... i was happy to meet a 'gentleman' for once. our next encounter, we went to the beach with friends, where his friend dropped the bomb that he was going to war exercise within 2 days for a whole month, is coming back on leave for only 2 weeks (if that) then being sent to canada for 3 months for more training. he has been to war before, he barely wanted to open up about it but said it was rather scary. he seems mentally stable to me however. the same day we made love ... i know, too soon but i was not thinking i thought well he is leaving right. then the next day he txtd me all day, telling me he misses me and would like for me to wait for his return. im already falling for him. the day he was meant to leave at 4am, he surprised me by coming to see me hours before he had to be on his bus. told me i was beautiful and sweet and that i should again Wait fo him and he wants a relationship. im 18 btw and bt the time he come back to these parts from canada, ill begone to uni.he has already told me he is in love with me, first sight he calls it. and when i told him i as worried about the earl sex, he said we can wait a while but he still respects me and cares about me. what do you guys make f this? is h using me? or are solders just that way they fall easily? im not in love of course but i do like him... any advice?