I No Longer Have A Sense Of Commitment Towards My Marriage

I have been deeply hurt in my marriage that I no longer have a sense of commitment towards it. Right now, I am hesitant to leave because of an opportunity in the nearest future. I plan to leave him once I get my citizenship in the US through him, and then concentrate on raising my kids. I feel it’s the least I can use him for to compensate for the pain and hurt I have been through for the past 15 years.

He’s been into several affairs, in which he discusses me with his girlfriends, he had a son and did not let me know before we got married, and still caters for the lady and her son. Our sex life is nothing to write home about. The intimacy is dead and now I could not care any less. I will only seek my good in this relationship as I am done being selfless.
I would like to hear comments and sincere opinions about my decision which I must say I’m not comfortable planning. It pains to have to have ulterior motives with someone I love but I have learnt that men are selfish and so I should be too.