Hi! What's your native language?
"Though", **not to be confused with "Through"*** is also a shortened version of "although" (pronounced Ahl-th-oh) and both can be used interchangeably.
"I'm going to the party, THOUGH I really don't want to."
Here you could also say....
"I'm going to the party, BUT I really don't want to"
"I'm going to the party, ALTHOUGH I really don't want to"
"I'm going to the party, HOWEVER, I really don't want to"
Its a way of pausing for reflection, or debate.
Hope this helps