<human>: I've been friends with (we'll call him D) D since my junior year of high school. He's always had a bit of a crush on me, and for a very short period of time, I had one on him as well. He's always been a tad bit on the odd side, but nothing TOO creepy. 

That is until I found out D was arrested for possession of child pornography. I found out from a local news article, and when I confronted him, D lied and said it wasn't him. I told him we couldn't be friends anymore (due to the lying, and the whole CP thing), and he was devastated. Not long after, he was sentenced to a year of jail time. 

He got out a few months ago, and contacted me. At first I was okay with talking to him, but things started to get weird. He constantly messages me to hang out, to ask what i'm doing, etc. And he keeps wanting to take me out on a date, but i've been seriously dating a guy for the past couple of years, so obviously that's a big NO. 

How do I tell him I don't want to be his friend anymore, without being too harsh, or hurting his feelings? I care about him as a person, but I just don't want to associate with him anymore, he really creeps me out. 

Any advice is appreciated.

Can you condense the text into a few key points?
<bot>: Former friend got sent to jail, and upon release immediately started asking to hang out, etc., how do I tell him I don't want to be friends?