Increasingly, especially during the Covid pandemic, we have grown used to communicating online even for dating. The most important thing about meeting someone online, is you should always remember they may not be what they seem to be. So be very careful what you share about yourself online, in particular be careful about sharing photos, details about where you live.
Be very careful too if you agree to meet someone you have met online. First meetings should always take place in a public place, preferably with a trusted person nearby.
Take snapshots of bullying messages and report them.