My god, some the advice.
Just because you boss may, or may not have decided he wants to fuck you, no way means you have to "take it" - he doesn't make decisions about what you do.
Absolutely take the job. Get the experience, get it on your CV, sounds like a great opportunity for the future.
TRY not to get sexually or emotionally involved with said boss. It can have serious implications, if you find yourself going down that path with him (because YOU want too, not because he wants you too) you need to be firm with him and explain you dont want it to cause trouble in a professional sense, and if you were going to start a relationship, it would mean one of you working for a different company.
I'm saying this as a woman who did have a "romance" at work with someone in a higher position than me. I had to work pretty closely with him, when it all broke down some time down the line, it made work horrible, and it was difficult to respect this person, or keep my emotions in check around him. I have been left that place for almost 2 years, after working thier for 10 and being a well liked and respected member of the team, unfortunately after this "romance" I could no longer stand working there. Even after the person in question had left.
Work colleagues 'knew but didn't know' which also made it difficult as I was also in a position of authority over them.
Please take the job, but please put yourself and your oh so important career absolutely first over a man! Even if you suspect he "fancies you" and thats why you've got the job, you really need to know show any idea that his fondness for you is the reason, and absolutey assume that its because you are kick ass at your job.