Knowing whether your partner is "the one" can be hard. Especially when you meet earlier in life. It’s tough to know who is truly here to stay, and who may just be right for the moment. That was true for Monica, who fell for a guy in college and then wasn’t so sure. Hers is a story about multiple new beginnings, and about the importance of getting to know yourself before going all in on someone else. Email us at loveletters@boston.com.