Real Life Problems

So, I was without any chat app for a while, cuz I thought it would help me concentrate for my college entrance exams. And now that I'm in, I just installed everything back... So, I received some messages on whatsapp and could recognize some of them, cuz of their pfp o just cuz I knew their numbers... But then I received a message from this dude greeting me, whose number I didn't know and he didn't have a pfp either... But, I changed my cellphone recently so it's just normal that I don't have everyone's contacts... Then I asked them who they were and they told me they were trying to talk to his uncle. When I told them I didn't know their uncle, they told me they typed the wrong number... I thought our talk had ended there... But then this weird person asked me if we could be friends!
I thought, " Ok, I talk with a lot of weird persons that I don't know anyway... There's no problem... It must be some of these extrovert kids..." Then I told them it was ok...
But, since that point, things started getting creepy...
First they told he was a guy named Pablo and asked for my name... I told... nothing wrong with it... And then he asked me where I lived. I didn't answer and said I don't know him enough to tell this. But, out of anywhere, he told me I was pretty and called me baby?! WTF?! I asked how old he was, and turns out he's 35! From my pfp you can clearly see that I'm less then 35! Actually, I'm 19...
He started bragging for me about his farms and checked my number to see where I'm from and then asked me for confirmation of my location and told me he had a house near...
I stopped answering this dude for a little time and now he keeps sending messages with hearts asking where I went to!!!
This dude already saw my pfp and knows my name, and, from his number, he really lives near here... I don't wanna risk meeting this weirdo outside and have he trying to make anything bad to me or embarrass me cuz I blocked him without notice...
So, can you guys give me some tips on how to get rid of this guy?
Help!!!!