I’m very sorry that your marriage is suddenly in trouble at a time when you have succeeded in a personal goal of losing weight. There is a chance that the two are related on the surface, ie: your husband finds you more attractive and worries others will also. However, there has to be more to the story to cause the level of insecurity that you are describing from him.
He has not only violated your privacy repeatedly without you giving him reason to be suspicious, but he also has evidence to the contrary (finding you at the park when you said you were going to the park, accusing you of being out while you were asleep next to him, etc). And you have a right to have friends and socialize outside of the home, especially if it’s not excessive.
I fear that your husband has crossed a line and needs professional help to get through this, both individually and as a couple. If he continues to refuse this help you may have no other choice than to give him an ultimatum, either he sees someone or you will need to separate. He may need a serious reality check of how much stress he is causing you and leaving him might be the only way to get his attention. I hope it doesn’t come to this but you need to play hard ball and he needs to treat you with respect again.
All the best,
Dr. Holly Counts