Since the communication is over text, your mind expands on what you are reading.
A simple phrase could be interpreted as much more than what it was intended to mean.
Receiving the smallest compliment, such as one complimenting a new hairstyle, is quickly interpreted as a strong sign of romantic interest on his part.
These are people who connect with each other online, whether it be through platforms such as a dating app, social media, niche communities, interest-driven groups, forums, etc.
Thanks to the internet, people are meeting potential partners they would never have come across in real life.
To this end, there have been a multitude of long-distance relationships established online.