Mental condition. And ask dinner done?

1>I have some unwanted thoughts when I study let's suppose while I'm studying anything but in my mind there something like suddenly remember anyone of mine previously known girls, wanna talk but I don't allow to call by myself. It's also hampered in my concentration even I can't complete my daily schedule. 2> Also I look very boldly or wildly to any women's and girls and judge her violently and thought about intercourse with that particular lady. And then I decide to watch porn cause I can't control instead of doing anything wrong I watch porn. 3>I can't sleep properly every night, and very attractive to my phone. 4> Tendency to forget, suppose I talk to anyone over the phone and ask dinner done? And the other person whom I talk reply yes but after 4-5 minute I asked again and he laughed amd say don't be jocks and replied u that "i take my dinner but I can't memories it😔. Please help me in regards . THANK YOU IN ADVANCE.