<human>: Can you summarize the given text in a few sentences?

We've been pretty successful so far, the past 6 months.  Problem is, people refer to us as House and Cameron.  I see the world as gray...I question everyone's actions and consider everyone to have an ulterior motive.  She sees the world as being nice, everyone's intentions are innocent and good, and everyone's wholesome.  Lately, this has caused some...questions between us.  

Example 1: A guy in her class asks her to lunch, and she's excited to meet a new friend.  He continues to ask her to lunch/coffee, I'm pretty certain he's asking her out, she thinks he's just being nice and assumes he's just being a good friend.

Example 2: A guy she had a history with calls to catch up.  They talk, and he wants to grab coffee. They do, and he now calls regularly, and I get the inkling that he has an ulterior motive.  She thinks that they can go back to being friends.

Example 3: We see a homeless person on the side of the road.  He asks for some change to feed his kids.  I immediately remember that he was here last week asking the same thing.  I think he's probably going to go get some booze/drugs, and she thinks that he deserves a chance, so she gives him a few bucks.  

The #3 example doesn't bother me as much as #1 and 2 do.  We talk about every issue that comes up, but now it's just getting a little tiring.  What to do?
<bot>: gf is optimistic and sees the world as a happy place, everyone is nice.  I see the world as a dark place, where people are generally not that great.  Will we work?