Hey, I think Dave is just as wrong in this. Yeah, I've been hosed many times, but I was never the stalker obsessive possessive jerkwad that Dave has been about it (at least I hope I wasn't). Dave's gone over the line in acting like Charla is "his territory" (as he has said before about her).
On the other hand, last episode I think Charla goofed a couple of times. First was when she called Dave and asked him to come see her because she was "lonely". I'm not saying that was wrong for her to do that, but she had to know that Dave would read the wrong signals into that and take it as an invitation. Then she got mad at Dave when the Terrible Trio showed up to harrass them. That wasn't Dave's fault, and Charla should have realized it. But instead of confronting the transgressers, she took her anger and frustration out on Dave, because she knows he'll take it and not say anything because he likes her.
Now, I do think Dave also handled the situation wrongly, but that can be overlooked given his emotional state.
Anyway, there's more than just this, but I think we could just agree to disagree, and I don't want us to end up looking like ruben and k1w1 here.