cat overweight?

Im not too sure if my cat is over weight or not

From this angle, yes, it looks like it.   Cats should have a slightly defined waist from above.  Also, you should be able to feel their ribs with you gently press on their sides.  Just barely, but feel them just the same. 

Within this thread there is a chart you might find helpful:  http://www.thecatsite.com/t/303767/are-my-cats-at-a-healthy-weight