Walaikumasslam. Man and woman are bound to be attracted towards each other. So, there should be some precautions that need to be taken for eg. if you want to meet someone there should be third person present in some cases. However, in your case as you said you both have been in a relationship apparently thus you should ask your parents for your marriage. If you have sincerity related to each other then you should quit meeting and get married soon as there is a lot of chances to get involved in haram even though you are saying you not into that stuff but i am saying that this is against the shariah of Almighty. So, Yes this is a haram relationship.
O children of Adam! Do not let Satan deceive you as he tempted your parents out of Paradise and caused their cover to be removed in order to expose their nakedness. Surely he and his soldiers watch you from where you cannot see them. We have made the devils allies of those who disbelieve. [7:27]
I will approach them from their front, their back, their right, their left, and then You will find most of them ungrateful.” [7:17]