There are a number of web sites that will help you research what breed is right for you. For an appartment, you don't want a dog that is highly energetic and gets easily bored, unless you want your dog to destroy things in you home. You could try adopting an adult dog that has gone through it's energetic puppy phase and is ready to be calm durring the day.
Just some ideas for you.
Animals give the purest emotions available. Humans can not compete there.