I really want my boyfriend back, is there anything I can do?

My boyfriend and I have just split up with in the last week, we have been going out for 1year and a half. The reason why we split up was because he felt that through some of the arguments that we had etc we had forgotten about the friendship we had before being romantically involved, which I also agree with.He and I both want to find our friendship again, how would be be able to do this? The friendship that David and I had was amazing, we clicked so well and I would like to get that friendship back again, I am not expecting the relationship to go off in a romantic way, but if it did I would be really happy, Through the relationship that we had, I kind of changed, I got depression and anxiety that I think I became a lot more serious and not as fun as I used to be, David always talked about how he loved my childlikeness about me, not being chidlish but seeing things in a childlike way, kind of seeing the good in everything. I would like to get that person back, I would like to be the person that he met at the beginning. Do you think this is possible to get back? Do you think we would end up being good friends again? Also do you think there would be a possibility of being romantically involved again? Like I do he wants to start at the beginning and start being friends again and see where things go, we are starting from the beginning, kind of like getting to know each other again, do you think this will work?