I see you are from Manila, I apologise but I don't know about employment law in your country. I do know in the UK there are strict policies about this kind of thing to protect employees and if he were doing as you describe here he would be facing disciplinary action at the very least. If you are unsure as to your employment rights I'd recommend reading up, checking out your employment contract and also reading up on your country's employment laws.

Is there a human resources department you can take this concern to? Or failing that does your boss have a boss you can report him to? This might sound a little strong but if he is giving you unwanted attention you have a right to work without these unwanted comments/attention.

You know the situation best however, and from what you've written (screaming matches) he sounds volatile (managers should keep calm at all times) so yes best to be very cautious in how you handle this.

If you choose not to report his behaviour I can only suggest casually mentioning a boyfriend (even if imaginary), this may be dishonest but could be enough to put him off.