Good grief twinkleymum, are you me in some wierd parallell universe????
My ds is now 7.5 months old and is a dreadful napper, has been since about 3 months old. He too gets over tired and has a fit unless in the car or fed to sleep for a nap, I've tried putting him down every 2.5hours but it makes no difference as he fights sleep so much, he just hates that he might miss out on something and always wakes up cranky after a nap.
I too dread meltdowns (although they are far less frequent now). I hate it when, like today, family members come to the house and I have to explain why he's so grizzly and dread him becomming tired and whingey.
I have paced around my with ds listening to Savage Garden music more times than I can remember!!!! For some reason he has always just loved being carried around upright (the music is purely to cheer me up!
I have been told by many lovely mnetters that he is just incredibly inquisitive and raring to go. I'm still hoping he will calm down and relax a bit when he can provide his own movement and crawl. He seems vert close to doing this but he doesn't quite have the arm coordination to propell himself yet.
I think a lot of our babies' problems stem from frustration and just disliking being so dependant. My ds used to hate sitting still (still hates his carseat even now). He gradually (veeerrrry slowly) perked up since being able to roll and is fairly happy for short stints kicking and rolling on the floor. He now can sit well unaided so will sit for a while playing, leaving me some valuble arm free time! Still won't stay still in my arms, unless I stand and walk with him.
It's knackering having a baby like this and I know what you mean by all your friends babies are not like this! I posted such a similar thread to this about 9 weeks ago! Things have slightly improved since then, very gradually. Still have bad days but I have no doubt that is due to ds inability to nap for more than 30 mins so he's contantly knackered. If he sleeps well, he is far easier.
It will all improve when they get mobile (I pray!!!)
Seriously though, you have my deepest sympathy but mumsnet has been a lifeline for me at times so keep posting. Sorry you're having a tough time. It will pass.