Cheating

what are some signs that let you know your boyfriend is cheating on you?

He doesnt seem as interested in you.
He doesnt seem to have as much time for you.
He can't see you for reasons that dont make sense.
He uses excuses.
May seem bored.
Less talking.

He starts working late......a lot, his cell phone all of the sudden is secret and doesnt answer calls around you, he becomes distant, or a major one is that he starts accusing you of cheating and messing around becos he feels guilty and he starts blaming you and accusing you.