Men some times have difficulty expressing how they feel just the same way women do but there are give-away body language signs that may indicate that he is interested in more than friendship with you.
Probably you have had an inkling for a while that he might be into you but he has neither confirmed nor denied your suspicions, then these signs he will unconsciously give off is what you should watch out for.
Although you can not 100 percent guarantee his feelings based on his body language, you can easily know through these signs if there is anything worth looking forward to with him.
1. His pupils grow larger
Watch his eyes, if his pupils become larger when you are in each others presence without it being a dark environment, then most likely is into you. Our pupils dilate when we are excited at what we see, so that may be the case.