My roomate is like this. As is my ex g/f. Which makes me question whether or not she wanted to be with me for me, or just because she always has to be with someone and I happened to be there.
Personally, I refuse to casually date. If I can't see myself marrying someone, I won't bother asking them out in the first place.
On the other hand, there is a saying I've always used in regards to finding a woman:
"I spent all my life searching for the perfect woman, but when I finally found her, it turns out she's looking for the perfect man."
Oh and jynxed, your pet spiders probably scare all the guys away