i find myself falling out of love when it gets real

i have been talking to this girl for almost 3-4 months now and she is everything i’ve ever dreamed of but i find myself trying to convince myself that i don’t like her and that i want someone else but i really do like her? i also am just waiting for the day she tells me there’s someone else and i also sometimes be dismissive and start little arguments for no reason because i wanna see if she’ll stay with me or idek what. i just wanna be happy w someone but i find myself falling out of love when it gets real and we start like “settling down”. anyone else?