Are premarital relationships allowed in Islam?

Dating is still linked to its Western origins, which implies underlying expectations of sexual interactions — if not an outright premarital sexual relationship — which Islamic texts prohibit. But Islam does not forbid love.

Is it haram to have sex before?

GRAVE SIN. In Islam, premarital sex (fornication), as well as sex outside marriage (adultery) are absolutely forbidden and considered grave sins that bear serious consequences in this world and the hereafter (Quran 24:2). Islam gives sex a form of an esteemed status by limiting it to the husband-wife relationship.