That is the problem; most of the time you can't tell if a person has a STD because there is no sign. For some, you can see the warts, herpes sore, smell, or drainage from the infected person.
Well..... To figure out this, you need to ask yourself one question. "Do I like this person?" If you're a boy and you want to know if a girl likes another guy, simply watch her and see if she's...
Best thing to do is be completely honest and straight foward. Tell them face to face that you have feelings for them that you cant ignore and you just felt that you had an obligation (need) to let...