Most Helpful Guy
If it didn't work the first time, it won't work the second time. However, if you are just looking for a hookup/FWB and you think you can handle it, go for it, but. . . you may fall for him again and get hurt once more.
Most Helpful Girl
Take it like a grain of salt. You called him first, so he called back because of that reason. You made the first move, and he just called back to see what you needed and made small talk conversation. The bonus is he did ask you to hang out, I'd do it if you still like him. Ask him why he wanted to hang out afterwards and see how he feels :)