How can I stop this from happening again?

[KatieGray]

One of the guys I report to at work is always gazing at me, always turning up wherever I might be in the office, follows me around subtly is always being flirty in conversations and becoming jealous if other guys speak to me in the office.

I do not flirt at work and dress modestly, yet this is the fourth time I've found myself in this position in my working career.

I've just found out he is dating another girl in the office and I think someone has tipped her off about his behavior. Now he is taking to a mixture of avoiding me if I happen to enter the same room, or staring at me from afar. The way I've dealt with guys like this in the past was to ignore his bad behavior, but in every case it ended with the guy in the superior position getting angry with me or deliberately bringing his girlfriend into the office and flirting in front of me. I am so tired of this scenario.

Can someone please tell me what is the best way to act around this guy who has to appraise my work ( and he's already avoiding appraisals) without having to report him, because this is the kind of company where they look after their own, and I really can't afford to lose this job.

I have tried ignoring him unless it is strictly business related, but the last time I did this, my former colleague got super angry at me. This is so not fair. Why do each of these men get angry with me, when they already have girlfriends and in one case a wife?! I am desperate to avoid another showdown with yet another one of these 'men'.