Pisces man suddenly keeps distance, what to do?

Posted by Malukah
My Pisces man and I (Aries) are back together. We??re dating now since 3 weeks and the first two weeks were great! But since last Thursday he is in this mood where he is not really here and to communicate with him his really hard. He ignores me, goes out with me to the cinema but after that tells me at 8pm that he would make himself food and go to bed because he is so tired but is online than until 3am and tells everyone the next day while I??m sitting next to him that he couldn??t sleep (We live in the same building he could have come down and didn??t text me that he would go to bed now). I can barely touch him, especially when we??re outside.
Then he tells me that he would be free on Wednesday evening, than when I asked when he wants to come over that he ???might be free later. But not feelin great so might just have a early night.?? I said it??s okay if he would not feel well, he should just tell me later if he comes. Asked him later if he made a decision yet. Some guys showed up later because of our fire alarms and told us no one opened the door on his floor. He could have been asleep but the fire alarm later must have waked him up and he would have seen my message. At 10pm I got the notification on my laptop that he would play games now and he was up until 3.30am again.
I know him since last september and he told me that I'm the person he would open himself the most to and that I kicked in a door twice already and I'm the first who was able to do that. He has some problems which was the reason it didn't worked out the last time we were together, now he has different ones but he normally talked with me about that and it helped him. Now his excuse is that he is tired. He is in the same mood like a few month ago, when we distanced us from each other, because I didn't know him well enough back than and thought he wouldn't have any interest anymore.
I don't want that to happen again! Can I talk to him about his behavior, that he hurts me with it and that it's just not okay to lie to me like that? And how can I do that? If he needs time for himself that's okay I just need to know that it's not me and that he comes back, but I don't because there were other girls he was/is interested in and I have no idea if he still wants something from them. I'm just scared that when I confront him he would panic/hate himself/run away and I would lose him again.