Girls, Why would a girl say hehe and not haha she messaging a guy?

Anonymous
didn't speak for months , i originally asked if she wanted to date she was “ not looking “ . I recently started talking again. This time she seemed more flirty putting “x” etc , and I said I still liked her and wanted to see her. But then she kinda jumped ahead and said

“I’m back in my home town soonish x” then. I said that would be nice. she said “fabulous it’s a deal x” which seemed like she jumped at it. So I said let me know when your coming home she put “hehe, ok will do x”

why did she put hehe? , and kinda jump at the chance to come out with me. She seems more flirty after 6 months of not talking.

During the 6 months of us not talking she Sometimes always the first to view my posts and story’s
Girls, Why would a girl say hehe and not haha she messaging a guy?
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