Creepy Old Man

Van Helsing just gets to Lucy House after Dr. Seward calls for him to come help him find out what is going on with her. He wants to check her out to see if there anything wrong with her alone!! "So, my dear, we will send him away to smoke the cigarette in the garden, while you and I have a little talk all to ourselves." why does he need to be alone with her to just have a talk and to see if there anything wrong with her? Is he just trying to get close to her by them selfs since he never been married or anything his old and she is young and beautiful.