I'm a teen boy of 16 and i wonder why so few teen boys have faith, or want to be open about it if they do.i am always open about my faith and I talk to teen girls abut it and they are more willing to discuss it and there are more girls come to church, but if i try to talk to other lads my age they seem to get uncomfortable and don't want to talk about it. I don't understand why
I teach Sunday School to 7th and 8th grade (ages 12 - 14), but I work with older teens at times. Teens normally don't have that much experience with life. Many of Jesus' ideals, like treating people right, make sense to my kids, but it's a bit early for some of them to really think about the meaning of life. It depends upon the person, of course.
A lot also depends upon your community. We're in New Jersey, which is hardly the Bible belt. But still we have a good youth program in our church, in which a lot of kids participate. It's hard to do something if none of your friends are doing it, so I think it's likely to be easier for our kids to talk about faith and think about living it out than someplace where no one else around them is visibly Christian.
Not all churches have active youth programs. You might want to look around in your community. It's pretty common for kids to worship with parents Sunday morning but be part of a youth group in another church that has a more active one. Any of the mainline churches (Methodists, Lutherans [ELCA], Presbyterians [PCUSA], Episcopal, American Baptist, UCC, or Disciples of Christ) should be reasonably compatible with your church. (I'm assuming you're in the US. If not, obviously the list of denominations will be different.)
There are differences in development between girls and boys. Girls typically develop socially a bit earlier than boys. Some adults will say they mature sooner, but I don't find that the greater social orientation necessarily means more mature. E.g. our guys seem to handle conflict better than our girls.
So it's possible that in some groups boys might be more inhibited about talking about things that matter. Pre-teen and early teen years tend to be the hardest, in terms of making kids afraid to say anything that might make them seem un-cool. You're just starting to get out of that period. I will say that in our church boys and girls participate equally. But I still see differences in how they react.