I don't know if my wife loves me?

My wife and I are married for 10 years. Before we got married she was madly in love with this other guy for whom she was even considering changing her name and religion (he is Hindu and she is Muslim). He dumped her, and then I came along. She said she loved me and that this other guy who dumped her was only an infatuation that came along. I always loved her since childhood and after she broke up with that other guy we were in love and later got married. I also belong to Hindu religion too but my wife from the day we got married was very expressive about not wanting to do anything that was even remotely hindu for my sake or my families sake. In fact on lot of occasions I let my parents feel dejected so that my wife does not have to feel uncomfortable. I sometimes used think why she never did anything to please me (although I never asked her to convert) when she was willing to go all the way and convert to be a hindu for that other guy. Recently she got in touch with him (after 10 years of our marriage and having a 2 year old son) and they have been exchanging almost 30 to 40 emails each day, and spending at least 2 to 3 hours on the phone secretly. Some of the emails did not look appropriate at all. It sounded like she was flirting and in fact being romantic. They both were using disguised email accounts and not signing their names. I found this out when I felt suspicious as she was being very reckless and totally ignoring me. Not able to withstand I just decided to check her email which lead me to this other account she was using just to talk to him. I am not very proud of intruding her privacy but I had to do it for my piece of mind. Anyways after I confronted her right away as my blood was boiling after reading those emails, she did not seem regretful, may be guilty a little bit. I was heart broken, but she din't seem like she was hurt. It felt like she was upset for being caught. I love her, at least I feel that way, but now when I look back I cant remember of anything she did for me to show her love. She would occasionally say that she loved me but never did anything that I could feel was selfless. She has been nice to me, but that's about it. We both love our son a lot (really a lot). But I don't think she feels committed to our relationship. She will be a great mother. Do you think she still loves me? If she's not in love with me should I still continue our marriage for the sake of our son? I am really lost on what to do.