I think your therapist can love you and you them. And that love is real. ( someone remind me I said this next time I post doubt on my therapy relationship) I think the therapy relationship can fill some of your needs but not all. And really that's the same of any personal relationship, no one can fill all your needs, all of the time.
I think therapy can help you come to terms with the love you didn't get from your primary caregivers, it can replace some of the negative experiences or missed experiences in a very boundaried way.
It can teach you how to find and recognise healthy boundaries and support you in finding people who can fill those needs for love, acceptance and belonging. It's healthy to have lots of people who offer us different things and collectively you will find what you need.