Opponent is losing, keeps putting me in CHECK


At my level "there is no such thing as a clear win"? You haven't seen the game, and you don't even play 960, so.... I'm trying not to be rude.

If it has happened 3 times or more - in the same position - press 'Offer a draw' and it will declare a draw by repetition.

I don't think you are referring to stalemate. That is treated the same on all sites as it is a clear draw in the rules of chess. I have played on dozens of sites and they all recognize stalemate and award the draw.
Perhaps you are actually talking about the three-fold repetition draw, or the 50 move rule draw, or even insufficient losing chances (all with very different defitintions) but you are not talking about stalemate.
As long as your opponent has a legal move left on the board with any piece or pawn, then it is not stalemate.

you must find the move where you cannot be checked if such a move doesn't exist then you will draw unless they stop checking you , be patient understand the opponent is also doing their best to not lose which is only fair isn't it
after the match you may want to look at analysing your game to see how you allowed repetitive checks , to avoid that happening in a similar position again

i guess he is trying to get a perpetual (keep on trying to check) to get a draw
https://www.chess.com/live/game/3347552739
and can you also paste the link to your game so i know what you are exactly talking about

one last thing , stay calm do not get flustered as it would ruin or interrupt your thinking , you have done well to be so close to winning v a higher graded player , do not lose because they have broken your focus and made you angry by fighting back

some players here have no class and most of the time are the ones that never improve, which I found somewhat comforting. It is a toxic feeling, but I am human too and having someone keep playing a totally lost game, because he hopes u might lose connection, or have a heart attack and blunder, it's super cheap imo
it is also funny when they ask for draw when u promote a pawn to queen and they have a king only. I mean what is the point in that? I usually decline and say to them that I want to prac checkmating with the queen. then, they always quit.

@number-0.
Comment faire nulle
Parfois, la partie d’échecs ne s’achève pas sur une victoire, mais sur une partie nulle. Il existe 5 manières d’arriver à une telle situation :
- Le jeu aboutit à une impasse quand l’un des deux joueurs ne peut effectuer de coup légal à son tour de jeu, bien que son roi ne soit pas en échec. C’est ce qu’on appelle le pat.
- Les joueurs peuvent se mettre d'accord pour faire nulle et arrêter de jouer.
- Il n’y a pas suffisamment de pièces sur l’échiquier pour forcer un mat (par exemple: un roi et un fou contre un roi).
- Le joueur peut demander la nulle lorsqu'une même position est répétée trois fois (mais pas nécessairement trois fois de suite).
- Cinquante coups ont été joués sans qu'un pion ait été déplacé ni qu'une capture de pièce ait eu lieu.