Love is a pain

See, there is this person that I think I love. Supposedly she loves me too. But I can see very few signs of that. She responds really slowly but she isn't inactive: she posts and comments. Is this normal behaviour for someone's girlfriend? I get it that she likes talking to others and havings things to do but shouldn't the boybriend be a priority? Btw she wanted to be my gf. I don't know what to think anymore...Is it my BPD speaking or are my concerns legit? I'm just not sure of anything anymore...