I'm sorry to hear that someone treated you poorly. No one has the right to do that to someone else no matter what. However, it does happen. There are big time losers in the world who do this on a daily basis. You may have ran into one of those that does this on a continual basis in a need to stroke their ego, or one who is scared. If nothing else, you need to believe that you have done nothing wrong. It's a sick game and these are sick puppies. You just need to be wary.
I have run into men who in the course of messaging with me have revealed similar situations, have gotten hurt, and the same names keep coming up. Often, out of a sense of loyalty, they are reluctant to reveal the names until they realize that is not owed in any way. There are notorious users who have played trusting people like yourself and then discarded them. They often want online sex without commitment. They crave attention but are self-absorbed and do not give anything back. They constantly take. They lead people on and are quite charming about it, albeit insincere. They have one reputation in public and another in messaging. Negative. The latter they will try to hide at all costs.
Normal people can be open with other people online after a certain amount of time if trust is built. If you look around the site, you will find a lot of great friendhsips and many of these people are in constant contact offline and in real life. However, these predators play on that. You need to be careful. A sure sign: see how much information they reveal about themselves, and then see how much can be verified in the real world. If their name keeps changing, if they are evasive about themselves, if they are over-protective about their identity, if there are constant excuses about not being able to reveal information—get out fast. There is reverse information that can be obtained on the internet. Phone numbers can prove very interesting. If you have the chance to go back and read what they have written, you can often put two and two together and discover more information. These people are not infallible. They screw up eventually. Investigating can also prove interesting. In my conversations with victims I am aware that the information given did not add up. There are no records to verify these guys existence. Sometimes these guys will assume the identity of another person—living or dead. Some have prison records. Some have severe social problems. What these guys eventually found out was just plain creepy. Consider yourself lucky that this did not go farther. You may have been spared a world of hurt.
A very wise friend of mine keeps reminding me: "never trust anyone until you have met them in person and looked into their eyes."
You seem like a good guy and I hope that you will eventually meet someone wonderful who is deserving of you and has your best interests at heart. You haven't done anything wrong other than deal with a highly flawed person. You may have been the best influence on them, but until they realize what they are doing and how it is affecting the person that they use, there is nothing you can do to help them without continuing to hurt yourself. You need to take precedence. A worthwhile person enhances your life and makes you feel good about yourself. They give back. Trust me, there are more good people in the world than schmucks.
You'll be fine. I wish you love and great happiness in your life. You are deserving.
Sam
Addendum: I wrote this some weeks ago and it may be more appropriate here.
Yes, and it also needs to be noted that it's amazing how far some of these men will go in their pursuit of homoeroticism and in cyber sexual or real life sexual encounters with other men, how they will use people for sex and then discard them in an effort to disclaim their cyber and possible real life gayness, and yet will adamantly proclaim how straight they are and get quite angry when questioned on it or outed for it. The denial in these men is as amazing as their voracious appetites for the sexual encounters they aggressively initiate with other men, and the lack of accountability for their actions is always self-serving and callous in covering their sexual identity and in how they treat the people that they engage to satisfy their needs. They are never gay in their mind, nor do they see themselves as the aggressor: it is always the partner that they use that is at fault. The ethics of this type of man are sadly lacking as they will unconscionably lie to their girlfriends, friends, and anyone else who they feel they must cover their secret lives from. Fortunately, these sociopaths are in the minority. It also needs to be noted that there are a lot of great men in the world who accept who they are, what they are, and are morally responsible toward the people that they are involved with.