you can't say she's crazy... she might have alot going on in her life, and adding someone too it, in magnitude of a boyfriend, might be a dangerious thing.
But, if he respects that, and just continues seeing her, then there's a opening for a relationship down the line... maybe soon, maybe later
Point of example. This girl I met at a party, she was pretty, and funny. we got to talking and she was telling me about her crazy ex boyfreind, and how she's sick of relationships, and just wants to enjoy single life for awhile... while, at the time, I was open for a relationship, I understood where she was at... I got her number so we could hang out in the future..
two days later she called me, and wanted to see a movie with me... me did that and grabbed a bite to eat.... I put no preasure on her or anything
we did stuff together for the next couple months, untill we went out to diner together... we both had alot to drink, and she made a move at me, and I said "I really like you alot, but I don't want you to put yourself in a position that you don't want to be in"... she asked what I meant... and i told her about how she told me about her "ant-relationship stance she told me about when we met".. I told her that I'm not the type of guy who sleeps around anymore with friends because it adds to much un-needed stress....
she liked that I was open about it, and that I respected her... but she told me "you know, you seem like a different type of guy, one that I could date, and be in a relationship with, and it won't add any unwanted burdens that many of my past relationship brought with them".....
so, we slowly started "dating"... then, she asked me one day to meet her parents.... so I went with her, and she introduced me as her Boyfriend.... later that night I asked her if she considered us officialy together... and she asked "what do you think, or want"... I told her that I thought she's a great person, and would like to be in a relationship with her and be an item, but we both have to be onboard with it.... we both aggreed...
time went on... and she then told me how much she loved me..... 6 months later, she purposed to me...
we have been together for 5 year, and married now for almost a month