Written or spoken words? If you don't want to use either, that could be difficult, especially if they're confused (if they think you're joking with them etc) You could: -Change your interested in on facebook -Put a pro LGBT+ picture on facebook -Leave EC open for your family to see -Guy watch in an obvious way If you just don't want to talk verbally you can write coming out letters or write a facebook status about it. Fb is a little impersonal, but totally your call.
Wear some appropriate rainbow jewelry, or a T-shirt that says your orientation, or kiss your boyfriend in front of your friends (PDA -- Public Display of Affection).
Ditto with Yossarian, you can try to wear an assortment of LGBTQ+ gear. Such as: headbands, wrist bands, bumper stickers, rainbow flags. Tattoos even if you're up to it.
I do like this idea but where am I meant to get a bracelet with the colors that represent me? I know where I could get a rainbow bracelet, but I'm bisexual, so where could I get a pink, purple, and blue bracelet?
You can go to some place such as Hot Topic and buy separate bracelets that represent each individual color. But if you're looking for just one bracelet then I found this on Claire's website. Also, I recommend the Red Bubble as well. They have a lot of fantastic LGBTQ+ shirts. (You click a design it shows you a shirt. It's a little pricey though, 19.99-25.00)