MY HUSBAND EX

hi i am reet...i got married 2 years before,,,my problem is my husband had 11 year love affair before my marriage..when i got married to him he was doing nothing by profession... and only for this reason that he is not establish in his life his girlfriend refuse to marry with him.. but in my case i love him and love is most important thing for me so that i ignore all that financial things and i got married to him..but now with my hard work i encouraging him to do something good in his life then he is planning to go for merchant navy so that now he is in his training period for merchant navy and he gone for training....he just completed 7 days there then i came to know he add her his x to his social networking site...it was shocking for me,...when i asked him about this then he told me there is nothing wrong i just add her because i show her that now i am too financial and professional stable but this answer not satisfying me....i just want to ask its natural or there is something wrong...or its same as he told me ...plz help me