Q: Pictures won't save, can't delete apps without ipad freezing up

I Have not updated my ipad to IOS8 because i do not have enough room for the update. But lately my ipad has been acting funny. Today I tried to take pictures and they would t save to the ipad from the camera. I can't open my photos because they won't show up, but when I looks at them from the camera, they are there and I can see them. Also, when I try to delete apps, my ipad freezes up. I can't do anything. But the apps are still vibrating. Then after a minute or two, it restarts and it is fine again. And when I play music on spotify it freezes and stops working. I have had my ipad for about three years. Any suggestions? Or am I due for a new ipad?