She may have been checking out the breadth of your anxiety; teenagers just starting with relationships are often anxious about sexual issues and not knowing "how to" kiss, etc. and boys of that age have hardons :-) more often than not! Whether you knew that at that age or not and how you felt about it; how "sophisticated" you were she might have been checking out and/or how "jealous" you might be in general. Problems in one area of our life can have an impact on other areas; and breaking up with your boyfriend could have made your family problems more difficult for you or vice versa.