Are these 2 signs, Capricorn?

Not that I completely believe in the astrological signs nd stuff but ive read alot about Capricorns and Aries not being a good match but the worst one, I feel like that cannot be bcz this guy that I'm seeing is an Aries and I'm a capricorn and we get along great but yea sometimes I feel like things wouldnt really work out if we have a serious relationship. I dk but for some reason I always find myself thinking of him..but then again it could just be a strong physical attraction...what do u think?