The 25-year-old only joined the Irons last summer from Wigan, but has been at the centre of rumours suggesting he was ready to walk away from Upton Park should a club match the £3.5million release clause in his contract.
Arsenal are said to be one of the teams interested in the combative midfielder, who had just returned from a hamstring injury and came off the bench in last night's 5-1 Barclays Premier League defeat at Emirates Stadium.
Diame, however, insists his full focus is on West Ham.
Speaking to the club's official website, www.whufc.com, Diame said: "I know there are people out there saying things about me, but I have spoken with the manager and told him that I want to stay here.
"I know the club want to keep me too, so I will continue to give my best for them.
"I knew when I signed that West Ham were going to make their mark on the Premier League.
"Since I came here I am enjoying every game I play on the pitch. I think I made a good choice because I am very happy at this club."