Can I legally break into a locked room in a house that I am a resident of?

Question Details: I was with my ex-spouse for 22 years; we are not legally married. He owns a house under his name and I am a resident now. He is currently upset for what happened in our relationship and has added a lock to a bedroom that I slept in for 3 years and only allows me to go into my closet when he's home and the door is unlocked. Can I legally break that lock to get into my closet? Also, I want to know my legal standpoint while living in this resident because at the moment he is not allowing me to stay in the guest room or the main room but only in a room that has no bed or lock on the door. I believe their items from my closet that I'm missing. One of them was a digital camera and eventually he give it back to me but I know I'm missing other things. What are my legal rights with personal items from my closet going missing, such as a personal laptop that I am currently still paying for?

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