Ending a 12 year friendship.

A close friend lost both his parents.
I was there for him at the funeral and after.
Now he's become very clingy.
We would normally hangout every 2-3 months.
Now he wants to talk on the phone and text alot.
I was ok with it at first because I wanted to be there for him.
He's always been a little flirty but nothing that made me uncomfortable.
I would just ignore it.

But recently he said he had a dream where I had his kid.
It made me want to puke.
Before this he asked me 3 times to be his roommate.
He wanted me to sleep over...I did 1 time just to make sure he was ok.
I have mental health issues and need my space.
Before all this he said he had 2 passes to a hotel.he wanted me to go with him. I declined 3 times before he stopped.

Another time he was laughing because I didn't feel comfortable with him coming into my home.(I only let men I'm dating into my home for safety reasons.)

I'm becoming annoyed because when I've established a boundary about him being pushy he just acts like its nothing.

I'm slowly taking distance, not answering phone calls and not going out with him.

I know if I try and communicate he's just going to act like it's all a joke.