I need serious help

I have jealousy and control issues. I’ve spent two years being single thinking I was dealing with these and not dating until I felt ready now I’m in a long term relationship and all of those jealous habits are coming back to me... I reach for his phone when he’s not around and check his history I delete girls on his social media I check messages and everything..... it takes up too much time and energy!!! But the thought of him talking to another girl behind my back and making me look stupid or being so disrespectful that way kills me!!! I don’t want to look I don’t even wanna think about it it’s weighing me down 😭 does any one else have this problem??? Any tips on how to get through if?!?!? Is it something deeper? I thought I’ve dealt with all my insecurities... help