I think it depends on how you interpret lonely. I've always had a great support system in family and friends so I haven't been physically lonely. But feeling

I think it depends on how you interpret lonely. I've always had a great support system in family and friends so I haven't been physically lonely. But feeling a sense of failure or that I'm dealing with a specific issue that no one around me understands does make me feel lonely or isolated. From other comments in the thread I got the impression that OP has done a lot of research that led them to use "lonely" as one of the main emotions worth mentioning in their pitch.