To make an ISTJ feel loved, it's important to understand their unique needs and preferences. ISTJs are practical, responsible, and value stability and loyalty in their relationships. Here are some ways to make an ISTJ feel loved:

1. Show appreciation: ISTJs appreciate recognition for their hard work and efforts. Express your gratitude for their contributions, whether it's for taking care of household chores, being reliable, or accomplishing tasks. Be specific and sincere in your appreciation.

2. Be dependable: ISTJs value reliability and consistency. Show up when you say you will and follow through on your commitments. Being dependable and trustworthy will make them feel secure and loved.

3. Respect their need for personal space: ISTJs value their alone time and privacy. Understand and respect their need for personal space, and give them time to recharge and process their thoughts. Avoid being overly clingy or intrusive.

4. Be a good listener: ISTJs appreciate when others listen attentively to their thoughts and concerns. Give them your undivided attention when they want to share something, and avoid interrupting or dismissing their ideas. Show genuine interest in their opinions and perspectives.

5. Support their goals and ambitions: ISTJs are driven and goal-oriented individuals. Show support for their aspirations and help them achieve their goals. Encourage their hard work and provide practical assistance when needed.

6. Be loyal and committed: ISTJs highly value loyalty and commitment in relationships. Show them that you are dedicated to the relationship and that you prioritize their well-being. Avoid actions or behaviors that may cause them to doubt your loyalty.

7. Plan activities together: ISTJs appreciate structure and organization. Plan activities or outings together, ensuring that they align with their interests and preferences. This will show them that you value their company and want to spend quality time together.

8. Be patient and understanding: ISTJs may take time to open up emotionally. Be patient and understanding with them, allowing them to express their feelings at their own pace. Avoid pressuring them to share more than they are comfortable with.

9. Show physical affection: While ISTJs may not be as naturally inclined towards physical affection, they still appreciate it. Offer hugs, hold hands, or give them a gentle touch to show your love and care. Respect their boundaries and comfort levels.

10. Be honest and straightforward: ISTJs appreciate honesty and direct communication. Avoid playing mind games or being overly vague. Be open and straightforward in your conversations, and address any issues or concerns directly.

Remember, everyone is unique, and individual preferences may vary. It's essential to communicate openly with your ISTJ partner to understand their specific needs and make them feel loved in a way that resonates with them.