<human>: Give me a shortened version of the text

Boyfriend ---> Jack
Boyfriend's best friend ---> Kevin

A little back story...
I have met Kevin before Jack had by about 3 months. I had sexual relations with Kevin only twice, but I eventually turned him down when he asked to be my boyfriend. The sexual relations thing lasted maybe 2 weeks?  6 months or so later I meet Jack and he has already met Kevin on his own accord and they become fast buddies.  After Jack and I become more serious I tell him about my and Kevin's past history.  Jack was really upset, but was able to forgive both of us for not telling him sooner and continued dating me and continued being good friends with Kevin.  

Present time, Jack and I have been in a committed relationship for two years now.  He has made me so happy and is the first official love of my life who has ever loved me back.  The problem is lately we've been lacking common interests and it's slowly starting to bug me. We are having trouble sharing similar past time activities and it scares me that we might be losing our spark.  

Now, Jack and Kevin hang out a lot still and every now and then the three of us all hang out together.  After dating Jack for a while and with some more quality time with Kevin, I notice that Kevin and I have more personal interests in common and I am starting to think that maybe I would be happier dating him instead of Jack.  This thought is really upsetting me because I want to stay true to Jack.  I want to stay dedicated. I love Jack. I know I love Jack.  I really don't want to fuck our relationship up over petty shit like similar interests. 

My question is, will my feelings for Kevin go away?  Is there a way for me to help it along?  Any other advice is welcomed too.
<bot>: I want to stay dedicated to my boyfriend, but I'm starting to get the hots for his best friend. How to fix this??