He suddently stoped initiating contact..

Hello everyone,
I think I need a little help from the wise people here.

I am dating this guy , we met on a dating app end of february and since then we were contently in contact. It was a chemistry in the beguiling but I was trying also to have deeper conversations with the guy in order to know him, I think he also enjoyed our conversations, we met in person three weeks ago and it was really good, the week after he invited me to his place (he lives in different city) and we had a very passionate weekend – well the sex was good, can’t hide it but also some conversations about relationships, i think i communicated what i wanted from him, and the way he was talking to me was like : let’s see where this will go.. I was exited about him, tryed to keep it cool like i am still wondering about him. Joked that my friend send me a video to see if a man deserves my attention and he replayed that is this that i am going to check. But suddenly after last Friday he stopped initiating any contact, any. He just wrote me fist thing in the morning on Sunday because he missed my late Saturday call. We spoke , we joke . Than on monday i wrote him : have a success in work in the morning he replayed but since then nothing. I left 3-4 days not talking to him and yesterday i called him-he answered immediately my call, I tried to have a normal friendly conversation like nothing happened, without raising at all the question why he disappeared, just at one point I said that i miss our weekend and that was it,but the conversation was a little but ordinary , did not feel him warm to me, but not distant either, just normal after i said talk to you later and closed the phone. Didn’t call any more, one week now I have this horrible feeling that I have lost him. This is what is killing me – such a sudden shift in behavior. Is this a sign he just started talking to another girl. For the moment we are all blocked at home because of the virus.