My baby only wants me, should I be worried?

She’s only 20 weeks but since she’s been about 2 months she’s flipped out when other family approach her and try to pick her up. Sometimes she’s fine with it if she’s in a really good mood but a lot of the time she just cries and immediately looks to me and really wants me, but she’s happy with dad grabbing her too. Today I had my husband take her while I cleaned and she cried the whole entire time! Only stopped when he would stand right by me so I could talk to her. She’s extremely attached- being exclusively breastfed probably has something to do with it. And I just worry about whether or not I should be alarmed or not. Is this normal? My mom keeps telling me it’s not and I should give her bottles which I try and she rejects and I’m at the point where I’m not going to keep wasting my milk. Like of course, I’m mom and she should want me and be bonded to me but I just worry about her not liking others. She’s too young to be doing the whole stranger danger thing and her cousin whose only 3 weeks older- my sister works- is totally friendly and happy around any and everyone.