Investigators will develop and refine a two-phase emotion regulation intervention. This process will involve 5 steps: 1) conducting 5-8 key informant interviews, including obtaining feedback on a drafted manual and materials from providers and case managers, 2) integrating the qualitative data, 3) running 2 participants through a condensed version of the intervention and obtaining feedback on the content, language, and text message interface, 4) integrating the additional feedback, and 5) conducting an open pilot with 10 participants to assess feasibility and acceptability of the revised intervention. The pilot will include 3 research assessment visits which will involve completion of self-report questionnaires using Qualtrics at baseline, within one week of completion of phase 1, and within one week of completing phase 2. Viral load (VL) will be assessed at baseline and at the final follow up.

Qualitative interviews. The investigators will conduct 5-8 semi-structured qualitative interviews with providers and case managers. Interviews will inquire about unmet psychological barriers to HIV-care, perceptions of proposed domains and text message questions and response options. All interviews will be recorded, transcribed and analyzed using thematic analysis. Prominent themes and suggestions brought up in the interviews will be integrated into the intervention materials and implementation.

Trial run of pilot. After integrating the feedback from the key informant interviews, investigators will recruit two participants to complete a condensed version of the intervention. After each of the 5 sessions, participants will be asked to complete perceived usefulness surveys. Both participants will then be interviewed to obtain feedback on the intervention. These interviews will be recorded, transcribed and analyzed using thematic analysis. Prominent themes and suggestions brought up in these interviews as well as logistic challenges will be integrated into the intervention materials and implementation procedures.

Text messages. Investigators will use questions adapted from a previously published personalized bi-directional text message intervention involving HIV+ substance users (TxText) to assess mood, adherence and substance use. Each participant will receive 3 texts/week inquiring about current mood over the course of the intervention. Additionally, in phase 2 each participant will receive weekly texts asking about their medication adherence. Given the stigmatized nature of substance use, investigators will use a coded query, adapted from TxText, which assess substance use in the form of a weather question. This coded query strategy has demonstrated feasibility and acceptability among a similar population of HIV+ active substance users. All participants will be reminded of the meaning of this question during phase 1. During the last in-person intervention visit, participants will identify 5 positive self-reappraisal statements and link them to response options to the mood query based on when they feel each would be most helpful in regulating their emotions. Throughout phase 2, participants will then receive their linked positive-self reappraisal statements in response to mood queries. Participants will then be asked to respond on a 6-point scale indicating how helpful the positive self-reappraisal was (0=extremely unhelpful to 5= extremely helpful), which will be used to assess engagement in phase 2 of the intervention.