Jealousy

I’ve been with my husband for 8 years and married for 3. I suffer from depression, psychosis, and anxiety. I get jealous very easily, and within the past year it’s taken a toll on our marriage. We have two kids together. Our kids are 8months and 2yrs. It gets so bad because I’m extremely insecure and I have self esteem so low that I’ll go out to the store and change my mind and not go in because I’m embarrassed about how I look. My husband is a pretty friendly guy. So he talks to a lot of people. His coworker took him being friendly wrong and sexted. We fell out over than... moving on, he recently started texting another female coworker and deletes all of the texts because he “knows how I will respond”. I’m upset about this. I know that this will probably end in divorce, but overall I still want to stop being so jealous.