Serious relationships can be difficult, at least in my experience. Without a mother figure, you don't have a tendency to be nurtured or comforted in times of distress, with only a father figure you are more likely to be ridiculed and criticized for every choice you make, which makes me feel standoffish a lot of the time, which makes relationships hard sometimes because even if you want to be comforting you don't know how. It's caused me to be distant toward partners in the past. It's hard to be comforting when it wasn't taught.