My BF is acting quite strange? HELP PLEASE!?

[S A]

Ever since me and my bf started communicating again after I have been unfaithful to him twice, he has been acting very strange like when he calls and i return his call he doesn't answer and like today he "rushed" to get off of the phone and said that he was busy for the rest of the week. is this strange to you? what do I do? what would you do? what is be fair for him to go out and cheat on me after i have cheated on him?
Also his emails that i have saved are telling me that he is having problems but I don't want to assume, but he is almost always putting himself down and stuff and is that healthy?

[x0_bankshot_0x]

If you cheated on him and then appologised so much and claimed you will NEVER cheat again, swore to God, vowed on your life etc... then i think your boyfriend would be very sad to do the exact same BACK to you when you knew they guilt you went through