Locopoco's Things

im dating this guy and i really like him, he makes me happy and shi like when im around him, its a whole nother lvl of happiness tht i only get around him. but theres been stuff in our relationship where he's made me have doubts before, such as intentionally making me jealous etc. and ive told him how itd made me feel such as, making me feel mentally/emotionally exhausted and he'd apologise but wouldnt change. Recently my friends have been telling me to break up cos the relationship is toxic? but idk.

people who're in a relationship or just in love with someone, how do you know that its love and what does it feel like to be in love?
how do you know you like that person??