Try these ASVAB Practice Tests.
Stay busy and be honest with your intentions. Continue striving for your own goals don’t let her life dictate yours. Stay positive in your letters, keep her in the loop of civilian life, how you and her family are doing and stuff like that. Stay/get in shape while she’s gone cause she will be when she graduates and shes gonna want to stay active afterwards. If you truly “love” her then you got no worries of doing something stupid but stay busy is my biggest piece of advice to you.