Personally I would say that I sympathise with you even though what you have done is wrong. I can understand that you might feel that people wouldn't understand or take you seriously when you tell them the whole truth and that what you have basically done - if I'm not mistaken - is to explain things in such a way as to paint the picture as you see it. SO if you know that something in your life seems terrible to you but other people might not think it so then you exaggerate it enough so that they will sahre the sae perception and emotional response to it that you do.
Taking your Dad for example, you say 20 years because to you it might as well be 20 years. It feels that way to you and so you tell it that way because you don't feel other people will understand it so well if you say 7.
I sympathise with that. I don't there's a person alive who hasn't embellished or exaggerated events in their life at some point in order to communicate to other people how they actually felt about them when they felt that was the only way to make them understand.
However, to do it to the extent where you feel you have mislead people in the way that you have is clearly wrong. People will be angry with you and hurt because they will feel that you didn't give them the chance to show you that they cared. They will feel that you didn't trust them. They will wonder why you had to come to them and lie instead of just telling them the truth and being honest as they have (supposedly) been with you. So they're going ot feel let down, disappointed, angry and betrayed. They thought they knew you and now they have to ask themselves what exactly DO they know about you - if you tell one lie then who's to say you won't tell more?
I personally would always give you another chance. We are here for a support forum and for whatever reason the form of support you needed was reassurance. You needed to know that people would like you and respond to you even if you told the truth, but in order to find that ou you had to come here and scope us out. You've done that and now you think we're a reasonably nice group of people and you feel sad that you didn't trust us in the first place. For whatever reason that was the support you needed - that was your way of finding your way and learning to trust us, and I would happily give you a second chance. I think anyone who fails to do otherwise is letting down the ethos of the site.