<human>: My roommate and best friend recently started dating a 38 year-old man that she met through school. She is 19. Her teacher was looking for a student to give Italian lessons in exchange for english lessons for her friend. This friend turned out to be the guy and he and my roommate had been exchanging lessons at his restaurant for a couple months. When my roommate got dumped, she kind of turned to him immediately. They started out being just physical and she assured me "It's not like I will be his girlfriend ever. He's too old". A few days later, she comes home and tells me in her giddiest voice that they are dating and she thinks she's falling in love with him....
Before this, the guy was pretty promiscuous with women. Apparently upon meeting my roommate, he had to tell several women his age to stop seeing him. A lot of his friends are questioning him as to why he is seeing a 19 year old seriously and what his motives are (as I am too).
Now I'm not the type to lie about how I see things so I told her basically that this was a stupid idea. She got very upset with me that I was not supporting her but I wasn't sure what else to say. 
Now she seems to be constantly asking me how I feel about the situation and I have yet to respond. She claims that age is just a number and she doesn't want to throw away something that is making her happy just because it's not conventional. I'm wondering how, as a friend, I should approach this. Is it my place? Am I right to even think that this situation is wrong?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My best friend is getting serious with a 38 year old and gets mad at me for not approving. Yet she always wants to know what I think and I'm not sure what to say.