Tarot Reading Says My Boyfriend of 2 Years Will Have An Affair?

I have been doing my own Tarot readings since 1993. I never learned every meaning of every card--there are too many and always mean something different depending on what other cards are next to them. My readings have been showing that my boyfriend of over 2 years will meet someone else (queen pentacles, lovers card) as well as showing heartache/hard times for me. I keep getting this same reading. I want to believe that the pentacles stands for me (I am usually queen of swords) but am I fooling myself? I have been worried about him being faithful in the future because he stares at other women alot and has two failed marriages. A psychic reader even told me that this person was not capable of staying committed/faithful to me in the future and I never told him about my fears/problems with him. Should I listen to him as well as my Tarot readings and break it off to avoid heartache in the future?