What does it mean when your boyfriend said he wanted more time apart because he felt married but seems lately he wants to spend more time with you?

It means he is immature. Why did he feel married because you were spending time together, big deal. He obviously has no idea what he is talking about because when your first married you hardly see each other because of jobs and other committments you had before you got married. If he wants space, give him some and let him know how confusing it is to be told one thing, especially something hurtful, to know how it feels.