a guy used to ignore me but asked me to hang out yesterday what does this mean?

[a person]

we used to be kinda close when we had class together but over the summer we didnt talk. he used to be kinda rude to me and he rated me a 5 when my friend talked to him. i saw him one day and didnt know it was him so i didnt say hi so he texted me asking why i didnt say hi and now ever since we have been talking (this was 3 days ago ) and then yesterday he asked to hang out