Is there any other manga similar to aishiteruze kudasai, sensei?

I really liked the creepy atmosphere. The psychological aspect is always so intriguing to me, but it's hard to find a manga with a similar feel that isn't yaoi or yuri. So anything involving stalking and obsessive or possessive 'love' is good. Preferably on the guy's part. Like Watashi no Megane-kun for example. I only skimmed through that one though, but it looks like a similar story.