How can I get my appetite back?

For the past 6 months or so, I’ve been eating extremely poorly. I have almost no appetite for anything and I often have to consciously talk myself into eating, especially when I’m with others. I never set out to lose weight, I was very happy with how I looked and how my clothes fit, and now I’m getting too bony and I don’t like it one bit. None of my clothes look good on me anymore because they’re too saggy. Most people have noticed that I’ve lost weight, but since they don’t know that it wasn’t intentional, they don’t see anything wrong with it. Although I feel fine for the most part (I just get light headed sometimes when I stand up too quickly), I know I’m not getting the proper nutrition and I’m afraid of the imminent repercussions if this goes on for too long.

Is there any way I can help myself regain my appetite without having to go see a doctor?

Thanks in advance!