Q: Still in love and dont know what to do

I was with my ex for only about 4 months or so, but in that time I grew to love him like no other. I would have walked across broken glass for him and he was all I thought about day and night. When he ended our relationship he just said it wasnt going anywhere and I was devastated, spent about a week crying and its taken me awhile to recover from it, in fact Im still not fully healed from the hurt. I never stayed out of contact with him which I suppose didnt help with the healing but I wanted to stay friends because he was genuinely a good person and the kind of person I would like to be friends with. For the first month or so he would initiate the conversation by texting me and stuff, then about a month later we met up and decided we could go swimming because we both wanted to get fit for the summer so nearly every day for the past two months we've been going swimming, chatting etc and been to the cinema a few times and we spent the whole day together at a theme park and its resurfacing all the old feelings for me. I dont know anyone who is this close to their ex, they may be cordial but dont see each other every day and go to a themepark together and all of my friends who I've spoken to find it weird which puts the thought in my head why is he doing this? He often texts me out the blue which he never ever did when we were together it was liking taking blood from a stone trying to get him to talk on the phone and we went for a walk awhile back just he two of us when the weather was nice and just chatted. I suppose my real question is is it possible he wants me back? Regrets what he has done? In one part of my mind Im saying no dont think that he just wants to be friends like we said we would be, but the other part of me is saying yeah but youre spending an awful lot of time together maybe he feels the same way and misses you too. I love him more than anyone I've ever known and seeing him on almost a daily basis puts such a smile on my face but inside my heart breaks when I know I just cant reach out and touch him like I used to. Should I just keep talking to him as a friend and see where things lead or should I say something? Im going out of my mind thinking over every tiny detail but I dont want to say anything in case I ruin a chance of a friendship.
Any advice is greatly appreciated =] thank you