My Muslim Boyfriend Who I Want To Marry

So I met this boy and we fell in love after about 2 years of us being friends we dated for 2 years and now we decided that it was best to end our relationship. We're still friends and in love but this is all really hard for us to deal with because we expected to spend the rest of our lives together. Honestly I don't see myself with anyone else. I was born Christian but when I went to live with my mum I stopped practising and I just realised that I felt forced into it. I just wanted to be free to learn about other religions before being forced into one like that. My older sister has converted to Islam and my step dad is also Muslim so that is what influenced me to learn more about Islam before I actually met this boy. I am willing to convert and be committed to Islam and my boyfriend knew that it was going to happen. The problem is he wasn't allowed to date. His mum found out about us through his sister because he fell asleep on his phone whilst texting me one day. Also in the past I think we had been tagged in a photo together and she popped up asking if I dated her brother and that she was just looking out for him but I lied and said no. I feel so bad and I want their forgiveness but he is convinced that they will not accept me in the future to marry him. Parents have a big influence in people's lives especially if you're religious you need their blessing to marry someone in a way. I know that it's wrong for him to date. I don't want that, I want to marry him I don't want to mess around like children. I just feel **** because he has lost all hope for our relationship because his mum spoke to him about marriage the other day and she said he needs to marry someone suitable. He obviously doesn't think I am. We're also young so again she has more power over her son and what he does. I know it was best to end it now before we get even more hurt but I don't want to just leave it as that without even trying to fight for us. I wouldn't cause anything in his family I would just get his guidance in converting and apologise to them and tell them that all I want is the best for him. Sorry for making this so long but it means a lot to me and it's hard because he is so stubborn.

So whats your question?

I know plenty of people who are married to Muslims whilst not being Muslim themselves. Some of the combos aren't what you'd expect like a sikh woman and Muslim guy, I also know some Christian guys married to Muslim women and Muslim men married to Christian women. So the fact a Muslim can't marry a Christian is ruled out.

Now do you know what denomination he is associated to? Is he Sunni, Shia, Ahmadi and so on? Some denominations have procedures you need to follow when two people from different religions get married whilst other denominations let you do what you want.

How old are you and whats your point?

He's a Sunni Muslim, do they have certain procedures?

My point is that will it work out? We come from really similar cultures as we are both East African. I am also half white though I don't think culture will be a problem. We are both 17 so obviously we can't just go and do what we want. I don't want to disrespect our parents or his religion...