Reality hurts and i dont know what to do

So i just finished reading a manga called 3D kanjoo, i finished it all in one night about 4 hours to read it all. the story ends in a happy ending but i have this weird lingering feeling of loneliness and sadness after i finished it. then after reading that i watch the last two episodes of Darling in the franxx, and idk why but my mind is starting to realize how lonely i am, reading and watching those to really messed me up. i have friends but i rarely see them as they each do their own thing and only on occasion do we meet , i have a job and i always put on a fake smile and act cheery around my co workers  but when i go home at the end of the day and in my room, reality hits and i go down a roller coaster of mental breakdown. i love anime and manga but whenever i watch them or read them this feeling always comes up. I live a life of solitude, im to shy to meet new people so i hole up in my room and as days go by i feel my mentality degrade. im alone and idk what to do.