My boyfriends sisters son is ALLL of a sudden clingy


So her son has never got clingy to no one but his mom and grandma . Well for like 3/4 weeks now he’s all of a sudden always wanting to be around me . Always cuddling up to me and laying on me but NEVER says there’s a baby in my stomach. My periods in 5 days so I’m waiting to take a test. Any ideas ????