Being cheated

I saw a guy from matrimony who tried to chat. I replied him back. I usually never give away phone numbers but I was stupid enough to give away my telegram ID at first. I asked him to comtact my parents. He said he wanted to date first. And later he wanted to call me on phone. I gave away my phone number. We both talked. And 2-3 itself he acted like he couldn't stay without talking to me. We sometimes fought, but still he was saying that was losing a person due to stupid fights. It was not even 5days, I liked him back. I got addicted to him. He said he wanted to date and have special moments with me. And spending time personally would make him stay attached. Then we met once and had private time. From a day after he stopping talking, replying, doesn't even open my chat. I thought he didn't like me after seeing me. But later realised he cheated me. I searched his name and found out he is a youtuber. Have more than thousand subsrcibers. He made all false promises. Broke my heart. It was very very small period of time. Still I can't get out of it. What he knows about me is my place of living, full name, some of my history, secrets, my mother's number. And whole matrimony profile details. He didn't delete my number yet, he didn't block me yet. I don't think he will ever contact me again. But why did he keep my contact without blocking? Will he be a threat?