Some how my Samsung S5 got randomly linked to my Boyfriends S8+. Now my phone will randomly ask to be linked to his Google account or his phone will log into mine. My phone will send blank messages when I can clearly see the message on my end. The newest thing now is just lasy night at 3 in the morning while I was sleeping somehow my phone sent pictures to his via the the Hangout app. Not only was I sleeping and clearly not using my phone nor did anyone have access to it, the pictures where all old ones that I no longer have on my phone and I don't have my cloud turned on. I have ran virus checks on my phone and nothing has turned up. Is there a way to fix this?? HELP!!