Your question was: Match.com questions?.

My questions are this, do you think that a man and woman can be best friends like that and never cross the line? No..

 Do you think friends like this would chance things and mess up a good friendship? Yes.

 Should the person that he is dating (online dating with Match.com) be concerned? yes.

 ..

Sure I think they can be close friends and never cross the line. It would be extremely weird to think of her sincerely as a little sister and want anything from her sexually. His other friend sees nothing weird about this, and he sees her as another guy friend. I don't see anything fishy about this at all, but my best friend is male and I know nothing would ever happen between us - not even a remote possibility.ragingangel08 has stated many times here that she thinks any male-female friendship is "unhealthy" so please take her words with a grain of salt unless you also believe that a man and a woman can't be friends...

Yes, men and women can be good friends without crossing the line. I have close male friends. However, many things you do as a single person should change when you are in a relationship. Therefore, hanging out with your close friend of the opposite sex all night or several times a week is fine when you are single; not so cool when you are in a relationship. If the person is really your friend he/she would understand why things have to change a bit...

I can't speak to this man and woman but yes a man and woman can be friends without crossing the line. My best friend is a male platonic friend. That friendship has not affected our romantic relationships with other people.

,..

A friendship like that between a man and woman is fine. It's a great thing. But, if one of them becomes involved with someone else, the relationship (thru Match.com) is no longer appropriate. I'm not saying snub each other and forget it. But, calling all the time, texting, hanging out, etc., has to slow down considerably if you want a serious relationship (thru Match.com) with someone that's not your friend of the opposite sex. I would say they can keep in touch, maybe talk a few times a month, e -mail occasionally, but the emotional connection/bond can't be there like that. You need to have that bond with the person you are involved with...