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Only The Ring Finger Knows -
Definately recommend this one. It's a nice story and doesn't get any more graphic than kissing, so is very safe to read around other people. Also even though this one clearly is a one-shot, it does not suffer from the same failing as many other one-shot manga that I have read of being way too short.

Demon Diary -
This one hints at BL, but doesn't actually deliver on it. There's an implied relationshop but that's about it. If you don't mind this, it's cute and another one that is very safe to read around others. My only annoyance with it is that the main male character does look like a girl.

Loveholic -
Only the first volume is out, but the story is strong enough that it can stand on its own without a second volume. However since it has a 16+ raiting, I wouldn't expect this one to get overly graphic in future volumes. The first one only had kissing and a love scene that didn't show anything.

Little Butterfly -
This one is definately Yaoi. The first issue is very innocent and had me wondering why it had a mature raiting. The 3rd (and final) volume definately deserves it as it can get slightly graphic at times.

Il Gatto Sul G -
Two volumes are out on this one and the story is incomplete. I read somewhere that the 3rd one isn't even out yet in Japan as it's still being published. This one is 16+ and can get slightly graphic at times.

Ludwig II is amazing. The books are beautiful. There are three books in the series, and it doesn't come in English, but you can get them for a good price at jpqueen.com and look at translations here http://ook0.tripod.com/lud.html

Be warned, though. It's a tragedy. It made me sob to death.