I have a friend who loves me. I don't really find him attractive. Out of pity, I became his girlfriend. I feel incredibly bad, and I should have told him upfront. It would have saved him a lot of hurt. What should I do?

Hmm this seems a bit hard , its pretty difficult especially
if you want to be friends only and you’ve already went into dating him because you pity him , I think that you pretending isn’t a good idea , because you don’t feel the same , and leading him on will get him hurt more especially if you choose to break up with him later , don’t go too fast or too deep into the relationship and quickly break it off , be nice and polite and gentle when you do officially break up with him , don’t be too hard and say things like  ‘ ugh sorry youre not my type so lets just break up ‘ , be more gentle and smooth , and don’t ignore him for a long time after you do dump him it makes him feel bad and think if you hate or dislike him a lot now . But I reckon you should  quickly end it and become friends again because really its better to be single then have a bad relationship , and I know you probably know that but if you get this problem solved quickly no ones gonna get hurt , he may seem to love you , but love is undescrible , he might be feeling a Biggggg humongous
crush but not love , so just be friends and quickly get it over so then it willbe better instead of hurting him or causing you guys to hate each other and im sure he will understand . Plus you don’t know what wil l happen maybe soon you will like him more than just a friend anddate again , maybe now you are just feeling like friends with him . good luck :)