Also i was wanting to know when it would be safe to have unprotected sex with a boy from my church?

See below: Just because he is a boy from church, does not me he does not have an std. Also, you greatly enhance your risk for pregnancy. Use protection.

After you marry him: Unprotected sex is almost never safe from transmission of illnesses and /or risk of pregnancy when it's between a fertile male and female couple. It is much safer in a committed, monogamous relationship in which the two of you would embrace a pregnancy and be prepared to raise a child. Even in the confines of a monogamous relationship, previously acquired infections can be transmitted.

Safe from what ?: Any sexual contact you have exposes you to anyone that person ever had sex with in the past.Unprotected sex exposes you to the chance of pregnancy & STD's that are incurable or can make you sterile. The only safe sex occurs in a monogamous relationship between two uninfected people.