<human>: Can you give me a shortened version of the text?

My boyfriend and I have known each other for a while now and have had a good relationship despite ups and downs. Majority of the times, our problems seem to stem from my insecurities. 

I have had bad relationship history where I have been cheated on or lied to and from that it makes it very hard to trust others. I know he would not hurt me deep down but I have a habit of thinking of bad scenarios. I worry when he goes out with friends, when he's at work or grad school, overall I have a fear of him always finding someone else who he might be more interested in. I know we have been together for 6 years but I can't seem to shake this habit. 

I check his accounts sometimes and find that sometimes he does not tell me the whole story or seems to leave out some things in general. For example he will not tell me if he has made plans in advance with friends or will purposely leave out details about some girl who has talked to him on his night out. 

Recently I have confronted him about a girl who he has been talking a lot to but he says it is nothing. I get jealous easily and assume this of every female that gets close to him. I want to believe him but I cannot help to bring my guard down. I am constantly checking his accounts and I do not know how to bring myself to stop. Sometimes he will change his passwords and it makes me feel as if he is hiding something from me, instead of helping me. 

I feel pathetic since I am already an adult and I would hope that I would have these trust issues resolved by no. But I do not. I have seen a therapist but I still cannot shake the habit of always checking his things every hour or so. Is there a way or any advice to stop and bring my mind at ease to this? I do not want my relationship to fail because I am afraid to trust.
<bot>: Cannot seem to break habit of checking accounts but do not want relationship to fail, is there any advice or ways to combat this insecurity?