Wait.He used paypal or you used him to buy btc from him ? You have to open a scam accusations against that member as mentioned above in the correct format.I'm still not getting your problem though.You say you were using paypal from 6 years and he charged back ,how ? Did you buy btc with your paypal or he bought btc from you using his paypal?
What is their that you cannot understand what OP is telling, He is clearly telling that he has paypal account for more than 6 years and using it properly , and last time he has 1.03 btc with him which he sold it to the Bitcointalk forum member after the deal is finished the forum member charged back the money which he sent for buying btc from the OP. so now he got scammed by the forum member by paypal charge back policy using it wrongly.
That is why so many thread and warnings are issued in this forum not to use paypal for selling or buying bitcoins, but every week i use to see some one getting scammed.