Calling all Sagittarius men...........Is there something I did wrong?

I have been dating this Sag man for about three months ( i'm a libra woman) everything started off great. He was very attentive. We spoke to each other every day and he would come to visit me every other day. he treated me with so much affection and attention. He introduced me to his son and some of his friends and family. I thought everything was perfect. Well he got into a bit of trouble and ever since then he has been withdrawn from me. He has expalined to me that when he is not in a good mood he doesnt want to speak to me in fear o flashing out at me. Our relationship has gone from constant communication to rarely speaking. I didn't speak to him for 5 days one time and it left my mind to wonder what he was up to. I have read about Sag men and I couldn't help to think that another woman has caught his eye. Well when he finally contacted me, he explained that he lost his phone and had to get a new one. He also decided to change his number so that certain people wouldn't contact him any more. Well I was upset with him and I was in the middle of something when he came by so I kind of pushed him away. when he called me later that day i rushed him off the phone explaining that I was trying to get ready to go out to a club with friends. He seemed ok. The next day he came over again, I explained to him that I would be busy later on and that i would hook up with him later. I asked for his help picking out something to wear and he acted he didnt like anything. Somehow when he left, he ended up with my car keys in his pocket. He called me about 15 minutes after I left to tell me to look for my keys I told him that I had them and he kept on asking me was I sure finalyy he told me he had them and that he would be bringing them in a few minutes. I left the door unlocked and he left the keys on my counter and then called and told me that he lied, the keys were on my counter which was not the truth because i was in my kitchen when he originally called. Anyway we spent some time together later that evening. I went to sllep and when I woke up he was gone. This is something that is very unusual for us. I haven't spoke to him for the last two days and again i'm worried. can someone please give me some advise as to what is going on with us. I want to be with jhim but I cant stand these games.