So I know that I have to try to gal however the thoughts of my wife going out with other guys whilst she and I have separated is hurting me

How do people get past this ?

I know I am a very jealous person ...I do not know why ...it is probably my own insecurity

Throughout our 17 year marriage not once did my wife give me any reason to doubt her honesty and her commitment to me why do I feel so insecure ? How Can I get over this ?

Me:48 W 41
M:18 T:26
2 D 18 & 4
2 S 17 & 13
Bomb: 20/7/2015 in house separation
D filed 06/17
Separate houses 10/17
D Final 29/12//17.