It is good on your part is you could able to recognize your feeling clearly. you are getting emotionally attracted to him.
I am trying to understand your dilemma. you are in trying to get the answer for your confusion, that you are right or wrong ?. It is only you can decide what is important for you. what is meaning of commitment to you and what is the meaning of commitment according to your partner. Are both of you are ok with you having emotional attracted or attached towards the third person. In case you and your partner has different opinion about this, how you would like to go about it?
Please take care of yourself, respect your feeling, give value to inner thoughts. Don't allow any one to take you as granted. It is also quite important for you also know why new person so emotionally supportive to you. Is it only emotional support or for some thing else ?
while answering all these question, rather than just thinking about answering me, please put yourself in those position and try to find answer for your self. you will get more clarity about confusion you are in. i am just giving direction to your thinking.
Please feel free to discuss with me or other any other counselor.
with bet wishes