This may be easier if you live in a city.
As a student I sometimes just got all prettied up and went out - maybe just to a shop or post office, to look around boutiques (it's normal for a girl to shop alone), but sometimes even other people thought I was going to a hot date and even asked me about it haha...
Also just walking/jogging to the park, or was sitting on a bench/in a cafe/by riverside writing in my journal etc. Sometimes people started talking to me, or even I chatted up another jogger with a doggie or such... It's easier if energy levels are higher, jogging/exercise/movement can help with that.. It's good if you smile too..
what kinda event can i go to? esp ALONE. i cant go to concerts alone..(i missed my fav bands concert which sucks)..
I don't know what kind of events are available locally? Check online what's happening, some stuff may be on FB etc. Also don't know what you're into...?
Friends of mine have gone to concerts alone, and they're girls - one even got a bf that way!! (You can just maybe say you got 'lost' from the others or the mate you were supposed to meet didn't show up or something like that?)
There may be workshops or courses or eco events... Maybe sometimes just things/events in the park... or the library... poetry readings, gallery openings or such maybe.. It's normal if a person comes alone, it's easier if you at least know people who work there or the poet lol or some others with similar interests... Or you can pretend to just be a big fan of the art or interested in the topic etc.
Or you could join a club/organisation with your interests... eg poetry/songwriting/literary/artsy/eco club or such...?