They're making Alex look as though he has a Napoleon Complex, since he's the short guy. He gets mouthy and starts drama with any guy that's a potential threat to him in the house. While I agree that Derek seeking out reassurance from Jojo may rub some people the wrong way, I don't find any reason to be a jerk to Derek. From what we've seen, he comes off as a quiet and nice guy. Personally, I think Alex needs to mind his own business and worry more about Jojo than every other guy in the house.
The date she had with Robby was interesting. Seems a little early for people to be saying I love you to her, doesn't it? Doesn't seem genuine to me yet.
Anyone catch the previews for later in the season? They showed the proposals and Jojo saying that she loves a guy who can't love her back the way she wants, and they show her saying to the reject guy that she loves him but can't forget what he did to her. Very curious who she's saying that to and what transpires there. Sounded like a potential betrayal of some sort.