I am felling very sad but not guilty for what i have done...plz read it and told me am i right or wrong?

Question

there is a old friend of mine X and my girlfriend Y.Y and X known each other through facebook before my relation with Y.It not kind of serious they just chat 7-8 times.After my relation X and Y start chatting often.I never stop them from doing this though i not fell very ok with that.There is another friend of mine who told me that Y used to like X starting in my relation.But Y already told me about that "she know X and see him as a brother".So i did not respond to that comment.whatever X and Y friendship grew strong or i don't know.X wish Y happy birthday but did not wish to me.though Y always told me whenever she talks to X.So it is going ok.
What happens is now that (i forget to mention that all 3 are live in different places) X goes to Y place for some work and he called Y.X does not told me he going there.Y also does not tell me she meting him.After they meet,they called me.and this situation freak me out.Y told me every thing whatever she does.But she does not ask me about that.also X is not thinking of that before they meet.If they are good friend before my relation then it is ok but their friendship is for me.so it hurt me badly.
So i tell about this to Y.She freaks out start shouting why u thinking of that we are brother and sister.But really in this world so much happening where u can't believe u r won uncle how can she expect me to believe her or him blindly.So in argument i told about that friend who told me about them.now it is a conversation about us.and i also thing to called X and told him i don't like it.
But what happen she called my friend who told that comment and said him very bad things.also she told X about that.and this whole thing is spread out in my friends.
Now i have become the bad friend a insecure boyfriend.My friends told me bad thing to me.They are saying that i don't believe them i don't believe my girlfriend and many thing like that.Both of them stop talking to me.It is happen just because she called my friends.If i talk to them scenario will be different.In that they will be the bad and i will be the good.Whatever i get what i wanted.now my friend will think before talk to Y and Y also think talk to my friends.Believe me it is required.Y is a good girl and very friendly to all.So i love Y and my friend also and i believe them.But they must not cross the line.
But thing is that, it happened one week ago.But still it hurt me.whenever i alone or whenever i think of that i feel very sad.I have done nothing wrong.Though it make me very sad.
They all have done wrong but i became the bad guy.I lose friends and some love from Y.But really ....what i have done wrong?And i don't want to be sad about it.Now it is bugging me a lot...

Answer 1

You did nothing wrong. I completely agree with what you did. You really can trust anyone. The fact that someone had said they liked each other and then they went and did that did send up some red flags.. Your not insecure, so don't let anyone tell you you are. If you were insecure you wouldn't have let them talk in the first place. Try to work it out with her, if nothing happened between them then there relationship might be what she's telling you. If you still love her and want to be with her try to work it out.

Answer 2

Don't live with guilt

Answer 3

well you are right friend but it doesn't help