He wants to wait for sex.

Isabell
My S O and I are virgins. We have been talking about having sex for almost 5 months. We're ready. Thing is we have a chance tomorrow and he  told me we should wait for a better time. I'm kinda sad because I got exited. I'm confused. Now he wants to!? He won't make up his mind what is his real!! What should I do!!! ???