What is more sad is the fact that you're not the only one in this situation. Dating for men is incredibly brutal these days. Girls have extremely high standards and will not lower them until they get a bit older and reach their late twenties or early thirties. This is because of the shift of societal expectations over the decades. And the fact that you're not social makes it a hundred times worse. The truth is that talking to girls online is probably the worst way of forming a relationship. You can communicate with a girl online only during the initial stages but you should be trying to ask her out in real life and ask her out on a date.
Also, you said you tried 4 times. Believe me, that's nothing. Most average guys try hundreds of times. You need to develop a tough skin and get used to rejection. You have to accept that unless you're a Brad Pitt lookalike who's very popular with lots of money and has all of the physical attributes girls crave for, you're going to deal with quite a number of rejections. It's not unusual for girls to seem uninterested or bored. What you should know is that they get too much attention every day. They live in a different world to us. They base their own self-worth on things like social media and they get so much attention. Their perspectives and thinking is different and their brains are wired differently. They don't experience things that we experience. It's nobody's fault, but that's what it is.