Salamu alaikum. Brother, is it okay if one asked the opposite sex to go hangout? Note that this person clearly likes you and that they stated they wanted to get to know each other first before going steady (to marriage). Is it sinful to go together with the opposite sex with such intention? I myself do not consider this a date, but a regular hangout.
Alaikumassalam wa rahmatullah,
It is not good to spend time in private with a person of the opposite sex. Even if you feel it will be perfectly casual, you never know what will happen. And even if you go to a public place together, afterwards one of you may suggest going to a more private place and it may sound fine in the state that you are.
See my articles:
Secret romantic relationships in Islam
Dating and Relationships in Islam: What is Allowed and What is Not