Hi, I am a straight 15 year old guy who occasionally, in private, wears dresses and some jewellery as I find them comforting. I am not gay, or trans, I don’t do it to be or look like a woman. I do it to feel better about myself (plus I look good in them!)
For example, the other day when I was home alone, I wore a black dress that I took from my girlfriend once. That’s the thing, I love my girlfriend so much but I feel shitty lying to her about this. I want to tell her that I like dressing in this way, so I can do it around her without feeling like a freak . Should I tell her?
Also, I have been thinking about sex as well, and whether we should try it. Although it will be my first time, I am ready (despite that we are underage). I want to approach her about it to see if she is prepared to take our relationship to the next level as I am so in love with this girl!
Is it a good idea?
LemonVibe 
Cross dressing isn’t a crime. Use protection when you have sex and lube. Sex will hurt the first few times for her. If she says stop at any time. Stop or it’s rape.
Best wishes to you.
Just what anonymous said before. Cross-dressing isn’t a crime. You don’t have to be gay or trans to like wearing necklaces and dresses. Furthermore, if she loves you as much as you love her, she probably will be completely fine with you wearing ‘girly’ things.
As for the sex… I’d be hesitant. You, yourself, said that you’re underage. If anything were to happen, like an STD, then it won’t play out nicely for either of you. I’d say you should wait, because, from the sounds of things, you guys probably won’t be separating any time soon.