It can be hard to open up the subject to someone who's already insecure. You could try to focus on your own needs rather than theirs. This way, you won't be accusing your partner, and he won't be defending himself. For example, you could talk about the impact that spending all your time together can have on you, both in terms of physical health and emotional wellbeing. You could point out that being at each other's beck and call is a major time and energy drain.   Or you could try to talk about your need for time on your own without emphasizing your partner's feelings or shortcomings. You could say, "I'd like some alone time at the end of the week to recharge myself and prepare for the work week ahead."
assistant
Well, you could be a bit more assertive in responding to his reactions, to help bring the conversation to a better place. So for example, if he starts making a big deal about how you need space, you could say something like, "We can talk about this when you're calmer, and we can be respectful to each other's needs." If he still starts feeling upset, you can tell him, "When you get upset, you're making me feel upset too. I'm going to be on my own now."  Then you can either walk away or leave the room for a while to regain your composure.
assistant
I am in a good relationship with a very devoted partner, but there is one small problem. He is not comfortable with us being apart for even short periods of time. If I try to have a little time to myself, he wonders why and becomes unhappy, suspicious and feels rejected. I want a night here and there just to be by myself of no specific reason -- just to have some alone time. How do I achieve this without upsetting him?
user
It can be tough to maintain a good relationship. It sounds like your partner has some insecurity, and he is showing it by overreacting to your need for some time alone. He may or may not be aware of this insecurity, and he may or may not be able to change it. But it is important to be patient with him, and not to put pressure on him or act annoyed or upset about it. As the relationship gets stronger, you can tell him how you are feeling, and ask him what you could do to make him feel more comfortable with this need for “alone time”. You might consider doing some couple therapy with him, as he may or may not be aware of his own need for therapy.
assistant
I've tried to delicately broach the subject with him in the past, but he tends to overreact before the discussion gets very far. He immediately goes to, "Why do need time away from me? What did I do wrong?" But it's not about him, it's about me.
user