Yes you are right. In English we use the auxiliary verb "to do" to add emphasis, usually in two ways. Either 1) to strongly put your point across or 2) confirmation when contrasting or comparing two things. For example: 1) To make a strong point: I 'do' want to spend time with you. - Here the verb 'to do' is used to emphasise the verb 'to want'. 2) In comparing: I don't like sports very much but I 'do' love watching tennis. - Here it's used to avoid assumptions and add clarifying information. It's good to also remember that English speakers tend to add emphasis through intonation and verbal stress a lot!

You did guess right. It does put emphasis ;)