Cranky baby

SL

So my 3 month old gets 5 oz every 2.5-3 hours. After each feeding he is so happy and content but as it gets closer to feeding time he gets SO cranky and NOTHING will soothe him except for that bottle. I was feeding every 3 hours but he really can’t go that long anymore with being cranky. I tried to bump him up to 6 oz as he would sometimes cry after his 5oz bottle ended and in hopes it would satisfy him and he would go longer periods without eating but that only made him spit up more so we are back down to 5oz. Any other mamas going through this and can provide any solutions? TIA!