"I do love you, and I want to make sure you know that."

First and foremost, it is important to validate the other person's feelings and express your own. Showing empathy and understanding is key in any relationship, especially when someone is feeling insecure or unloved.

To elaborate further, expressing love can take many forms, and it's important to be mindful of what your partner may need in particular. Some people feel loved when receiving gifts or physical affection, while others might appreciate acts of service or quality time spent together.

In any case, communication is crucial in understanding each other's love languages and making sure both parties feel fulfilled and appreciated. It's also important to consistently show love and affection, rather than just relying on words.

If your partner is feeling like you don't love them, it's important to have an open and honest conversation about why they feel that way. Perhaps there are certain actions or behaviors that they would like to see more of, or maybe there are past experiences that are impacting their ability to trust and feel loved.

In any case, it's important to actively listen to them and validate their feelings, while also expressing your own. Ultimately, a strong and healthy relationship is built on mutual love and respect, and it takes effort and commitment from both parties to maintain that.