My dog does the same thing. I don't believe she is dominating you. Remember that dogs have a 'pack' mentality. They want to be where the pack leader is and follow his/her lead.  She knows where her food and attention and love come from, so she is near you all the time to recieve those things.  You are her leader and her best friend and she admires and loves you for it.  It is comforting to me as well.  Can anyone or anything love as unconditionally as a dog?  Who else is THAT happy to see you ALL the time?  Its wonderful. And in return we love and care for them the best we can.