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

The thought came when recently, I have been getting dreams of previous one-sided crushes who are taken in real life.  I don't think dreams mean much other than recalling information, but it worries me that deep down I feel like getting out of my first relationship.  The most I'd do is making small talk to a teammate I don't know outside of the gym or from a training seminar, but I'd still think they're cute or something.  It doesn't help that my 25 yr old BF will "sound" like a Grade C megalomaniac douche via IM VS actually sounding like he cares via phone or in person.

So I'd like to know where would the line be should a person decide that they have someone else they want to get together with because s/he is no longer in love with the current SO?  Is it infatuated feelings and then just break it off in order to gamble on getting with the new person?  Is it being friends with the new person?  Is it realizing that both parties like each other and want to go further, but the taken partner will have to break it off first before joining to the other side?
<bot>: Where would be the line where the person has to realize that s/he is going to be labeled as a cheater if s/he has no intention of cheating?