The other day I saw some questionable pictures on boyfriends phone from one girl (gave it me, wasn't snooping) I questioned him immediately and he said it was blokes jokes, but he snatched the phone back off me, went very quiet and then hardly spoke to me all day. Since then I've only spoken to him twice verbally and he's been very angry, not friendly and acting differently.
I think he's guilty of something as his behaviour is different to what it normally is, he's in contact maybe slightly reduced but not very friendly and definitely not loving.