DON'T use too many variations of synthetic laughter, lest you sound like Jafar. Rules: "Haha" and "lol" are mututally exclusive, and "heh" should only be used when hatching an evil plan.
HOWEVER. DO ASK THEM OUT. There is everything wrong with the composition of the above message, but zero things wrong with its content. If you're sensing that the sentiments are being returned and you're absolutely positive you're not messaging a droid, make the first move. Depending on your ideal date, "Want to grab coffee this week?" or "Want to buy catfish and spray paint at Walmart and seek revenge on my mortal enemies?" would work.