Need relationship insight or advice

Alright I've been with my boyfriend for almost a year and a half now. We've been taking it somewhat slowly (mainly because of too many "life" events where our relationship is not a priority) but surely because of how we feel of each other. We were there for each other for every situation we went through, both petty and real life stuff. He's even helped me through some mental health issues and believe me I was not easy to be with, and he's amazing for still seeing the good in me.For the past few weeks we've been arguing a lot and he's stressed from his life more than ever now when I'm sorta feeling I'm finally at my "prime" because majority of my life before I met him was so depressing and lonely.I want to help him, I want to be there for him. I try to help cheer him up, spontaneously try to get him out, and keep reminding him that I love him. I tried to give him space, and I was somewhat successful, that was probably one of the hardest things to do when all I wanted to do was be there for himWe're both very different people. We grew up differently. He grew up having these friends, adventures, and stories where I grew up isolating myself. But now that I'm finally seeing the good in life and wanting to see things and have stories of my own, he's isolating himself now as much as he doesn't want to. He says he is depressed. And I feel like I should know better than anyone he knows that depression is not logical, I feel like I was depressed and finally getting over it.Back to the point about me wanting experiences and what not. Our sex drive is very different from each other right from the get-go when we first met. I'm not saying that I always want sex, our average sex life is probably once every 1-2 weeks. But that being said, I'm very adventurous in the act in my mind. Role play, public, different objects, etc. (However he doesn't know all of that, he is aware of our difference in drive though) Am I selfish to say that I want my boyfriend more? I find him so attractive and because of his lack of interest it's making me feel less confident. Because of that we argue a lot more and it adds to his stress level and that's the last thing that I want. In fact I get anxiety when we do argue that I'm gonna lose him and it leads to more arguingSorry that this is a long post. Please comment or pm any advice you have or if you have any questions.Thanks