Search Results: bored in relationship

My ex boyfriend (of 2 years) came back to my state month ago so he contacted me
He told me he got into a relationship after me
But he's telling me has trust issues since she left him
But we were close so he still trust me abit and only talk to few people now
But he gave me his new number

Anyway so me and my friend were bored yesterday so I prankcalled him
- just called on private number and waited for him to say "hello" 3 times and then hung up

Few days later he messaged saying
"Hey did u call me on private number? Lol I know you 😂 you use to do this type of stuff"
But I denied it

How did he know it was me?
Does it mean he does not get private calls?
Or does not give out his new number to much people?

So i've been talking to this guy for about a week and we both got the dating app out of boredom, we start talking getting to know each other, a guy i usually don't go for. he's the hookup/friends with benefits type. We start talking about our experiences and our past relationships etc. we both recently got out of a relationship not to long ago. We seem to have a few things in common. Anyways as time goes on we start to lightly flirt with each other. He has said that i've had a kissable face and other flirtatious things. We video called and he did most of the talking, talked about his ex but asked if it was okay. He said that i have a baby face and complimented me, seemed like a nice guy. he's like the sarcastic type of guy