Hi Jamie,
I am so sorry to hear you are feeling this way.
Every one has an opinion when people disagree, or find someone else's opinion hurtful things can get emotional and very personal, especially when it happens online. Remember, none of these people actually know you so you can't really take it personally, but we understand how this can cause sad feelings.
If you want to talk about how you feel then it is probably best to talk to your family or close friends whom you can trust, this way you will not be talking about personal things with strangers who don't know or even care about you. The internet can be a cruel place with people looking to cause others misery and cause arguments so please be aware of this if you decide to open up publicly about your situation and feelings.
If you are feeling sad about things, thats ok, you are entitled to feel sad about things , and then you can move on with your life. These feelings of grief and sadness are allowing you to deal with the pain, learn and move on.
What's done is done, you cannot change the past or control others actions or words so don't worry about what you could have done or said. The best thing you can do is move on from negative people and allow yourself to be happy and confident again.
We are always here for you Jamie, I hope you feel better soon and please take good care of yourself. xx :)