Suspicions of Boyfriend Cheating

Jennifer
So I feel like my boyfriend might be cheating on me. We used to have a great relationship. But lately it's really rocky! I am a stay at home girlfriend I don't ever go anywhere or do anything with anyone outside of family. I love it this way! But my boyfriend has started accusing me of cheating and tells me I am acting different and always in a bad mood. I don't feel like I am acting any different and I can honestly say that with the exception of a few bad days I'm always pretty happy. But I found a few things on his facebook page that may lead me to believe that he is accusing me because he is the guilty one. No actual proof though. Just that he is all the sudden liking a lot of a certain females photos, he said "happy birthday sweet thing" to another female, and was messaging a 3rd one but all of the messages were deleted except one from her that only said, " glad to hear that" also his moods are super crazy! One minute everything is great between us and then all the sudden 20 minutes later he's accusing me of cheating and saying we need to break up, and then 20 minutes later he's asking if I love him! I don't know what to do!!!! I'm so confused!!!!