If you ever had any curable std's and had treated them would u tell your bf or gf or not n y?

my fiance contracted ghonneria and the clap from his ex wife and eventually gave it to his next wife and when she got pregnant on their wedding night a few weeks later she found out they had std's and was both treated....that realationship lasted a few yrs and then he and I met and have been together 14 months and been engaged 7months and just today found out that he had had std's which were treated and gone yrs befor we met....should I b mad he never tokd me when we first met so I could make the decision to b with him or not once I knew that......now I womder what else I dont know since it took 14 months for him to tell me about his std's....