A pregnant woman can tell if her potential partner is truly interested in a long-term relationship by looking for signs of commitment. These signs include asking to meet her family and friends, introducing her to his family and friends, talking about plans for the future together (such as marriage or having more children), and showing consistent care and attention. She should be wary of any red flags that may suggest he is not interested in a long-term relationship such as being overly secretive or avoiding conversations about the future. Ultimately, communication will be key in determining whether a potential partner is truly committed to pursuing a long-term relationship with her.