My aquarius man - so confusing

I just don't get him.
I'm an Aries. Before we date, he gave me lots of attention - talk to me everyday, care for me even little thing, teach me lots of thing. I once told him that i dont read mind or subtle, if you want something, say it. Since i only saw him as a casual friend, i pushed him away because i dont like to "get" things from other people.
We get along well and he told me that i'm the type of person he wants to be around. And saying sweet things like telling me how different I am,...
Finially, we had chance to hang out 1-1, he asked me lots of questions (i never asked him any questions - i'm kind of cold person), i were little protective, i didnt answer most of his question, i told him to figure it himself instead. We hung out for almost 1 month, i can see he became weird - kind of struggling in his mind and behavior of not touching me (he tried to touch my hair, my shoulder and tried to hug me more)
One night, he were little drunk and admitted that he fell for me such a long time, that he got so depressed when I got away few weeks, and that i'm the only thing he wants so bad but can't have (he's quite successful)
You know, i had bad experiences, so i didnt believe what he said. I ignored things he said and kept everything like it used to, but this time, i give it a chance and start dating him (open relationship)
We had lots of fun, lots of common things. We were like high school couple. In just 2 weeks, he told he loves me. He started to stare at me more, hug and kiss me in public. And told me that he is so happy to be with me. That went well for another 2 weeks.

Then, things turned 100% opposite. He started to be distant, rarely talk to me, ignore me. I got so pissed off, but tried to be calm and asked him what going on, and asked if he wants breakup. Then, he said that he's sorry and he knows i'm upset right now, he will explain later. And it's been another 2 weeks without any explaination.

I have no clue what the hell is going on. I finally ended thing with him (i told him that i couldnt take it any more, i care about him but he didnt let me in to be there for him when thing goes wrong)

Anyone have some thought about complicated aquarius man to share?

I'm thinking you didn't seem very receptive to him. When he told you he loved you, what did you say?

When he said he loved me, i couldn't believe my ear, i had to ask him "what did you just say?" 3 times. Then, i were so happy that i couldnt say anything back, but hug and kiss him.
After few days, when the moment came, i told him I loved him, and he did the same (hug and kiss)