All of the time, people get into long distance relationships (or ldr). They are a very sweet relationship, and proves that love doesn't matter the distance. They are hard to maintain, since the couple cannot physically touch, but they are sweet, because it gives something to look for, you love.
Well, I don't see why not. Assuming both parties speak honestly when they talk, then they might actually get to know each other and like one another. An online relationship just implies that there is not a physical aspect to the love, which honestly, some people can actually go without. Love isn't the physical hugging and kissing and all that, its the caring about a person. So- if you knew that person, even if just online, you could come to care for them.
It can happen, it happened to me! It is harder to have a long distance relationship. It takes a looooot of patience and trust but it can work. Communication is key too, you must communicate because being apart from each other, you can't read body language. Long distance relationships are harder because there is more stress in things like jealousy (you don't know if they are seeing some one, married to someone or even have kids with someone), stress from having to keep putting credit or data on your phone which can cause financial issues, not being able to hug them and a lot more. Though these issues can be present, love can still shine through if the love is for the right reasons. It worked for me!
Online relationships are just as real as any other relationship. If you meet someone that you truly love it shouldn't matter if it's online or not. Distance means nothing when you meet someone that you connect with, that you can open up to and that you can truly be yourself around.