my date and its complications...

No matter what we can tell you, in the end it still falls down to you. You will have to decide whether you like the guy or not. Just go on a couple of dates if you can to get to know each other. Its not wrong to give him a chance if you like, regardless of the feelings of your female friend towards the guy. Its basically just dating and you didn't steal the guy right? The guy came to you on his own free will so you don't need to feel any guilt. You should try various scenarios when going on a date, not just movies and dinner, this will help you judge if the guy is good for you or not. Now with regards to you friend who likes you romantically, how would he know that the guy is not good for you? Its true that its a bit fishy because he likes you romantically, but then again if he is a long time friend of yours maybe, just may be he really is looking out for you. Love is one of the strangest roller coaster rides that you will ever be on so my tip to you, just enjoy every minute of it regardless if its painful or full of bliss. Its alright to make mistakes, its alright to be hurt. Remember what doesn't kill you can only make you stronger.