He's rubbed my clit as he fingers me or as we do it doggy. Or I'll be on top and rubbing myself. I've also had my legs on his shoulders so he can go really deep. We've done it standing, lying down, sitting, etc. We'll do it so that we can get the right angle where his cock rubs up against the front wall inside of me, which feels pretty good. I'll literally be shaking as he's penetrating me and rubbing my clit, but it just won't happen! And he lasts generally lasts about an hour or so. Sometimes more, sometimes less. 

Alone, I can't even get myself off when I masturbate, so I don't really touch myself ever.  

I've also never tried toys, and he's never gone down on me. We're planning on trying both soon, as we're really getting desperate. But because we already focus so much on my clit, I don't know if it'll be much different. 

I also usually have to try and keep quiet. We don't get much privacy. Usually I'm biting down and moaning into a pillow. We're gonna get an opportunity to have some soon though so we'll try being louder then. 

I also have both anxiety and depression, and heard those can cause an inability to climax.

I'm not on any medication, so it can't be that causing problems. 

I'm also only 16 and heard sometimes it's an age thing. 

Maybe I just don't know how to? I heard you should try to tense up from the waist below, and then when you cum you let that all go. But you're not supposed to be focusing on climaxing, rather just how good it feels. 

I really don't know what to do anymore. Sex feels amazing, but it's incredibly sexually frustrating not being able to let go and orgasm. Any advice would be greatly appreciated. Please help ladies!