What would you do if you find out about this?

lets say u are in love w a good guy or u think he is as good and honest as he say he is and then one day he tells you he gat blisters on his ,u go w him to a doc and the doc says its an STD, he tells u he hasnt bn sleeping around yet you hv protected with him,u let ti go and carry on with ur affair bt u go away from him for 6 mnths w work bt u tak to him everyday,a mnth b4 u go hm he tells u hez bn sick for a wk w the same STD, yet you go for tests and you find yourself negetive 3 times.what will you do en you love the guy so much