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Your girlfriend has trouble trusting men. How can you convince her that she can trust you? You can't convince her to trust you. What you can do is be trustworthy.
The most common complaint of singles is that they are lonely. God didn't design us to live in isolation. Intimacy is one our deepest needs. If you're single, invest your time with others. It's the language of friendship.
Are you attempting to improve your marriage by trying to change your spouse? Matthew chapter 7 tells us not to judge others. Examine yourself and see if YOU are the one who needs to change.
It's difficult to have quality time with your spouse while serving in the military. Speaking the language of quality time while apart is best expressed in a handwritten letter. Physically writing to your spouse is much better than simply e-mailing them.
Parents risk building an adversarial relationship with their teen if they don't allow them to express themselves.
What can you do when you speak your spouse's love language but you don't feel loved in return? If you make simple requests to your spouse, you'll be teaching them your love language.