hurt, I'm confuse

i've caught my husband calling almost everyday a very close friend of mine. He uses his other fb account to call her in her messenger. one time he is in the bathroom ang saw that he logged in with his other account in messeger ive seen in the call logs all his in and out calls. There were times they've talked like 2hrs. From his other fb i already saw his calls and ive told him its not normal. he said they are not doing anything just friendly talk. then recently i saw this calls again from his other account and i couldn't take it anymore. even my close friend she didn't told me that they constantly talking almost everyday. i feel so bad. they said its friendly talk but it is not normal. i confronted him and said that they are not doing anything