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

I am an undergrad student in the department of electrical engineering at a certain university that I will not disclose. I received a personal email from my department chairman, which obviously is a bit nerve-wracking for me. In the email, he explains that he wants to meet up with me and chat about my classes and my future and whatnot. I have a lot of friends in the same department and this has never happened to them. I'm one of those students who doesn't care that that much about school. I'm a B, B- student. So why the hell does this guy want to see me all of a sudden during my summer term?

That was a two weeks ago. A week ago, I met with him in his office. We talked about what I thought about electrical engineering and what I wanted to do with my career. I told him I wasn't sure and he said that's okay. He took me to all the labs and introduced me to all of his phD students (talk about awkward). We get back to his office and he starts telling me that he wants to start advising me seeing me regularly and shit. What makes this really bad is the fact that...well it's pretty obvious that he's gay. He has a wife and kids I think, but he's extremely feminine and I can tell that he's gay. My friends who have talked to him before agree with me.

At the end of the meeting, he said that he really looks forward to meeting with me regularly. He was so happy and giddy when he said it. I'm so fucking uncomfortable with this. I already have an advisor. I don't want to start meeting with him, but how do I say no? I feel unbelievable pressure right now, from 1) feeling like I have to be a perfect student and stay in electrical engineering, and 2) the fact that he's flamboyantly gay and I'm sure he'll fuck me over (figuratively) if he ends up wanting to have sex with me or something and I say no. Sorry if this sounds crazy but what am I supposed to do about this? I didn't ask for this shit. I meet with him this week again.
<bot>: my electrical engineering department chairman, who is gay, wants to start meeting with me regularly and I have no fucking idea why. It's a lot of pressure on me and I don't know how to get out of this.