Wife suddenly ignores me for 2 years after 22 years of marriage: How to find out if she’s having an affair?

I need some help regarding my married life. My wife had an affair in Jan 2018 with my brother's brother-in-law. In May-2018 I came to know about this. From that day to till date she has kept me away from her. From last year she is talking properly but also avoiding me. She doesn't like my touch. We haven't have sex from 2018 till date. Please let me know what I should do.

My name is Rajesh, I am 50 year old 4years back I got to know that my wife is in relationship with someone and after inqiuring in detail I found that, that was her second relationship. Earlier relationship was broken 1 year before. and she told me all herself when I ask on condition that if she didnt tell me I may take dicision of breaking. so sho told me everything without hiding. she is telling me that she still loves me. Arter that she stoped all contacts but after a year she strated developing contacts with facebook messenger and developed one more relationship with one FB friend. again when I got to know she stoped contacting him. this time ther was no physical relationship, but she admitted that he once kissed her. the boy tried to contact her in all ways but she somehow stopped this matter. I love my wife very much. I forgive her every time. three year passed now all this year she was not going outside alone without me. but in these days I also insisted her to go out, and she started going to yoga class where she used to go early and she is very happy now days. I dont know whether I am doing correct or not, some time I still have dought in my mind whether she will start again doing affairs. I am some times afread, dont know what to do. whether I should still continue trusting and loving my wife or what. we have one son age 16 now. I am confuesd sometimes but till date happiness is maintained in the family. But I am feeling lonely somtimes. what to do?

Hii i am 40 years married man and last 2 years i am in relationship with a married women , we also like each other she also confessed me she love me, in starting we talk long time by phone , she give more effort to meet with me she call me to came his home when she alone but from 3-4 month she not giving that effort to meet with me and not come near me we just talk on mobile we meet some time but not closser like earlier , i am not understanding where is going wrong pls suggest