The phrase "am solicitous of" implies a deep concern or care for something or someone. There are several synonyms that express the same sentiment such as being attentive, mindful, watchful, vigilant, and conscientious. Additionally, being protective, caring, and considerate are other ways to convey a similar notion. When someone is solicitous of another, they are often acting with genuine empathy and a desire to provide support. Other words like nurturing, encouraging, and comforting also capture the essence of being solicitous, suggesting a nurturing, positive relationship. Ultimately, using synonyms can help to add depth and variety to your writing while conveying the same meaning.