She almost died of smallpox in 1562, so parliament began to worry about the lack of an heir, and she was 30, so the time for producing one was narrowing
Elizabeth banned parliament from speaking in the subject, but PeterWentworth argued that it should be able to speak on what it liked. Fearing that blame for his words would fall onto the whole cohort, parliament locked him up in The tower
She didn’t get married for many reasons, some being:
she didn’t want to lose her power as queen
marrying a foreigner could damage relationships with other countries
marrying a noble would mean she would lose the ability to mess with the others
she swore to never marry after her mother was beheaded