How can I forget him? How do I improve my life from now on?

[Colour_buzzy]

How can I forget him? Our relationship was somewhere between flirting and friendship. Was he approaching me for sex? He was also manipulating me a little bit and then my studies and personal life was getting worse. I feel guilty. Do all men approach me for sex? Why are they so fake? Is something wrong with me?

[coldmarch]

The "something" wrong with you is only that you allowed him to abuse of you, psychologically. Manipulators can do their job only if the other person lets them do it, but they don't target you specifically as if something is wrong on you and "so" they behave like that afterwards. They would do the same with anyone, as long as they let them do that. And so they end up doing that with those who are softer, more accessible, have troubles saying "no", are introverted, shy, insecure, etc. The manipulation comes from him, it's never "caused" by the other person, so the problem is in himself first of all. He will do the same with other girls later, as long as they let him do that. Quite granted.
All you can learn from this experience is to detect on time early signs of manipulators and to be braver in saying "no", and to not engage in conversations or in anything that can put you in a position of "credit" towards them, whenever you're not sure you're fully reciprocated and satisfied in respect and care. The day you respond with availability and tolerance to something that made you feel bad, you're already telling them:"Hey, don't worry, you can be disrespectful again the same way because as you can see I accept it, so the bar is higher!", and grants them more access. Especially, also, don't crawl back to them because manipulators install an addiction in you. At some point you aren't really "crushing" on them but you're starving to get back your missing respect and dignity, as you feel what is their huge debt in your regard. But this also reinforces the manipulative mechanics, so better leaving the party and stopping this loop early. Another thing: mainpulators who had proof they got away with all their crap without consequences, do come back. They do. When it goes bad with another ones, they'll try to convince you they changed. Don't make this mistake, they don't change, neither alone or with someone's love, because it's not something merely of they behaviours but that stems from the root of their personality. You might check if they changed after 10 years, but at that point you'd have forgotten them...
If you get to train yourself to do all these things, you will naturally filter out the bad guys and reserve time and energy only for better ones. This is all you can do because you can -never- change the way a guy treats you just by "loving them more", "being more attractive", "being better at X" etc. Never. This is a trap countless women fall into and it's only a loss of time...
It's hard at the beginning because you're left without resources and a debt that was never repaid. So you've to try getting fulfilling experiences and distractions to, slowly, recover all of that. It will take some time. But respect the time needed, don't come back to him, let the time heal it. It will heal it, granted, as long as you let it do its job.

[Girlygovroom]

Yes to every question. Have fun