I misclicked a mate in 1 and promoted a pawn to a knight instead of a queen and then resigned
https://www.chess.com/live/game/1851959746
:'( ;'(
Google "first world problems". I could do it myself, but this thread isn't even funny, so I'm not bothering.
You lost Fraser....move on.
respect the game and your opponent. if there is clearly a slip.. a draw needs to be seriously considered.
Ya well, a few games ago I slipped and hit the resign button INSTEAD of the draw button. My opponent said he would have taken the draw. I like how in Daily Chess you have to hit the check mark before your move is final. That feature should be implemented in the resign/draw buttons too.
True story, one time my cat jumped up onto my keyboard and it mouselipped my queen enprise; it sat there nude in the center, capturable by black's choice of 5 pieces . . . after about 10 seconds, he declines the sack and goes on to lose . . . completely true! Feline gambit.
He probably thought it was some kind of ingenious diabolical trap?
I totaly agree!
I don't understand all this talk about integrity and respect. Asking for a draw afer you make a mouseslip?! That's total lack of integrity and respect. The problem is on your side, it has nothing to do with your opponent. If you don't intend to continue the game - just resign - this is my understanding of integrity and respect and that's what I do when I make a mouseslip.
your comment makes me even more sad
:'( can you give me advice on what should I concentrate on while playing? I'm a beginner chess player
Which mall are you the noobest of?
lol I mean " the noobest of THEM all 
It's a suitable username for me :"D
At rapid games I accept a draw if the position is equal and a mouseslip occurred. Obviously nobody is forced to accept a draw in such cases, but it is a matter of etiquette imo. I only accept "obvious mouseslips".
Being sad is the wrong way to approach chess. "Gotta get angry." - Nakamura.
Do your tactics trainer every day, and you will improve in a short time. If you aren't going to buck up $5 a month, at least hit "history reset" in your settings to have unlimited puzzles daily. Doing 25 tactics a day for a month will improve you more than anything else will. Then when you are concentrating in a game, you will see double attacks, pins, and other tactical motifs to which you are currently blind. It's like cooking . . . when you cannot yet cook you cook with one or two ingredients (egg, butter) which like a pin and clearance for example; but once you get good at cooking, you can use 10 ingredients which is all chess is . . . lengthening your tactical sight (seeing 3, 4, 5 moves ahead) using forcing lines by combining various ingredients. But you have to learn your tactics first before you can combine them together. Focus only on tactics practice, even over playing. The one thing you can do instantly is NEVER RESIGN!!
Try not to internalize the results, dwelling upon the "negative". Don't linger in limbic land. Feel, ...as it can't be avoided but move on. Learn this while you are young, as you're setting a pattern of response increasingly hard to break. Instead, analyse & learn, as suggested here. Chess may be a jealous lover, dominating & demanding much (time, energy, focus, study, play & post-game lessons learned, etc) in order to significantly improve. Focus upon "learning" & "comprehension", ...cognitive processes. There's no reason to "feel sad" about losing. If you're "feeling disappointed", focus upon understanding & correcting your mistakes. Ingrain this response. You will improve and get over this and yourself 
. Good luck!
ever hear of warriors or just any person not fighting an unarmed man?
But that's what you're ALREADY doing when you match wits with some of the players on this site... fighting an unarmed man.
Being sad is the wrong way to approach chess. "Gotta get angry." - Nakamura.
Do your tactics trainer every day, and you will improve in a short time. If you aren't going to buck up $5 a month, at least hit "history reset" in your settings to have unlimited puzzles daily. Doing 25 tactics a day for a month will improve you more than anything else will. Then when you are concentrating in a game, you will see double attacks, pins, and other tactical motifs to which you are currently blind. It's like cooking . . . when you cannot yet cook you cook with one or two ingredients (egg, butter) which like a pin and clearance for example; but once you get good at cooking, you can use 10 ingredients which is all chess is . . . lengthening your tactical sight (seeing 3, 4, 5 moves ahead) using forcing lines by combining various ingredients. But you have to learn your tactics first before you can combine them together. Focus only on tactics practice, even over playing. The one thing you can do instantly is NEVER RESIGN!!
Thanks for your advice 
You lost Fraser....move on.
respect the game and your opponent. if there is clearly a slip.. a draw needs to be seriously considered.
You mean like when a football quarterback slips and throws a stupid pass that gets intercepted, and the two teams get together and decide to call it a tie?
Grow up.
Are you kitten me? I litter-ally felt paw-some and paw-sitivily Purr-fect. Meow that other guy must have felt clawful. Fur-real.