Maybe your opponent didn't really know how to finish it off and was looking for a plan.  It's a risky proposition since if he really didn't know how to make progress you could have achieved a draw.

Your opponent beat you fair and square. What the hell are you talking about? Nobody cheated you and your the one who doesn't have a clue on what sportsmanship means. In simple terms your endgame needs work. So stop being a cry baby.

Martin_Stahl, you have a good point, but I asked him, during the game, what was he doing and he admitted that he was stalling to force my timeout. 

Which is perfectly in keeping with the rules.

romancitoG, he did beat me, I know. Also, I did not say he cheated. I'm just saying that forcing the opponent's timeout when you have a decisive advantage is cowardly. He was afraid to blunder so he kept stalling. I  believe that if he had played on it would've been more interesting than waiting for me to timeout. Good sportsmanship involves playing to the best of your abilities. That's not what he did. He used a cheap trick because he was too lazy to finish the game. I think that is very mediocre.

Although it is somewhat surprising that a 1300+ player didn't know what to do to win that position.

Sure, stalling is within the rules. Does not mean it is good sportsmanship or fair play like, which is the topic of the discussion.

Well, that's exactly what he was doing. Playing to the best of his ability. He didn't know how to advance position-wise, but he still tried his best to win.

Come on, do you really believe he did not know what to do? You said it so yourself: "it is somewhat surprising that a 1300+ player didn't know what to do to win that position." 

Time, like a pawn, like a Queen, like a well-defended King is part of the game, especially when you play without increment. Why should using a time advantage be any different than using a material or positional advantage?

I'm sure I'm missing something here, but why didn't you just resign bro. I actually think your a good player, I'm sorry I called you a cry baby. That was rude and uncalled for. Peace.

Sorry, but you both had the same amount of time. It is just that he used his in a better manner.

The time element is part of the wonderful but complicated game called chess. I have lost on time when I had material advantage and I didn't complain, it is the game and we all know the rules before we start.

Gary Kasparov's book 'How chess imitates life' has a section about time.Might be an idea if you read that, he implies that b'time' is an essential part of the game.

You lost the game so don't complain, think quicker and play quicker next time.

Peace!

There's a lot worse things your opponent can do than this. If stalling bothers you then resign next time.

You are probably right. 

Indeed. I can relate to how you felt. In live games I strive to improve my position to the point where they should resign or be mated. Having more time is an unquestionable advantage. Ultimately not be able to find anything resembling a counter despite his tactics is one reason I probably would've resigned rather than watch my opponent mock me. It's uncool how your opponent decided to run but it is far from unsportsmanlike.

Take it as a compliment that he couldn't really beat you.

Learn from it and move on. Develop a thick skin. It's not going to be the last time it will happen to you.

What really matters is how you treat others.