Sounds like your roomy is a tad on the creepy side. And asking when you won't be home would make me even more suspicious of him..

Real bummer your landlord wasn't more "considerate" of renting to someone more compatible with you...

Only suggestion I have would be to have a chat with him. One idea would be to have a "monthly house" meeting to discuss problems and things that are upsetting to you. He can also bring up things that are upsetting to him.. And if everyone is willing to work on the problem areas maybe the living situation would be more pleasant. If not, looks like your in for a miserable time. If you don't get these issues addressed it will only fester inside and you will be the one with the "tummy aches".. Where he will be having a good ole time...........

Either way, it really isn't easy living with "strangers or even family". I hope you can work things out.