I think that Brady is not a good judge of character.
He has had several relationships and non have been successful.
His first love was Chloe and it seemed that it would be a forever love story. However, once Chloe became a star, it was too much for him and he turned to drugs.
Then there was Ariana, Madison, Kristen, Nicole was in there somewhere. Not sure if I missed anyone. So I guess you could say that Brady really wants to be with someone.
He is very unlucky in love (Ariana and Madison both died). Kristen was bent on revenge. Nicole and he never could get on the same page at the same time!!