Generally, when talking about an activity in English, we use either the -ing form of the verb or the 'to + verb' form:
E.g. Dieting is useful. / To diet is useful.
I love going on holiday. / I love to go on holiday.
Now look at these examples:
Faire un régime est utile.Dieting is useful.
J'adore aller en vacances.I love going on holiday.
J'aime lire.I like to read / I like reading.
Je déteste manger des épinards.I hate to eat spinach / I hate eating spinach.
Note that in French, you will always use the infinitive in those cases.
Case of reflexive infinitives
Je déteste me lever tôt.I hate getting up early.
Vous aimez bien vous promener.You like going for a walk.
Basile adore se coucher tard.Basile loves going to bed late.
Note that when the infinitive is a reflexive verb, the reflexive pronoun (me, te, se, nous, vous, se) matches the subject of the sentence (i.e. the person referred to).
See also Conjugate reflexive verbs in Le Futur Proche (aller + infinitive)
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