It might be that God wants you to know how good the clothes look and feel, so that you will learn something about the opposite sex. I don't know what. Maybe so you can understand why women like to model to themselves, or dress their best, or feel sexy in a different way, who knows. But I don't think trying them on in private breaks the rule for men to not wear women's clothes. You're not really going out in drag, or making a 24/7 lifestyle in private.
My guess would be to figure out what it is about a woman's perspective that you might be being taught, chalk it up as a win, and then you probably won't care about trying them on anymore. I quite frankly, would ask for revelation and protection from temptation to make it something consuming.
I don't think it makes you gay. But I do believe that if it becomes too much of an obsession, it will possibly escalate into something more questionable maybe even that you convince yourself that you are gay when you are not, or decide to "give it a try".
On the opposite side of the spectrum, it might be that suddenly in the mirror, you just cringe and say to yourself, "dude, I am definately not gay, glad that's over with lol"