Yea that don't sound too good. I wish I could give you inspiring or hopeful or good knows but look, you sound like a very smart lady. Ask him str8 up what's going on, say be honest all you want is the truth. People fall in love and fall out of love every day. Who knows whats going on with 6-pack Joe. You never know, he may even be gay. Not that there is any thing wrong with that but he should be honest with you no matter what's going on. It takes a real man to say, "look babe, I don't know what's going on but I'm not sure about my feelings for you any more. I don't want to hurt you. Perhaps we should slow down a bit?" some thing, any thing!

I don't think your being insecure at all. You just want to know the truth and you deserve the truth. Don't be a doormat no matter how much you think you love him.