Introducing kittens

Hi I need some help I have a 5 month old Himayalan/Siamese male and he is such a cute guy he's not shy and very adaptable and he's just so easy, when I get home he comes running up to me looks in all my shopping bags and he loves kids he always cries at their doors for them to let him in he is very clingy and hates being alone. So I keep hearing how you should always have 2 kittens and I decided on a black male kitten that's 2 months old and at first he was very scared and would hide from everyone but than he came out and my 5 month old immediately tried to play the little one would hiss and growl my big one kept trying being very gentle and they ended up playing all night. My big guy is getting on his nerves now because he won't leave him alone he always wants to play fight and the big guy holds him down and scares him it looks like a fight but there's no injurys at all and my big one is quiet the little one makes the noise, the big guy has never hissed or growled in his life. The thing I'm worried about is the big guy wants to do this all the time and the little one isn't enjoying it is this. I haven't had the 5 month old fixed yet both cats are strictly indoor cats.

You need to get your five month old fixed very soon (if he isn't already) because your cat will very soon be at the mercy of his hormones which will cause all sorts of problematic behaviour. 

How long have you had the kitten? It seems as though you missed the introduction phase and your new kitten doesn't have confidence around your five month old. 

You could try playing with an interactive toy with them together. This has the twin benefit of allowing them to bond over something mutually enjoyable and to make them too tired to annoy each other. Using treats also helps this along by getting them to associate good things with the other cat.  

Thank you for your reply, the kitten has only been here for a few days and I didn't really know about that part until now. The people who I had been talking with didn't bring that up everyone just told me get a second kitten soon and they would get along great so I should have researched it more myself. The oldest isn't neutered yet I'm hoping to have it done in the next week, since I post this I've been letting them play and surprisingly they are both having fun the little one was looking for the older one and sneaking up poking him and he's actually having fun, thank you for your suggestions I will be doing them. I have only had female cats and they were so different they never paid attention to each other and when new kittens came they pretty much just ignored them.

I'm really glad to hear it. Introducing cats can be a very slow process and just when you think it's working out something will happen. Small time outs can help if things go pear shaped again.