**Visiting your boyfriend every other weekend can be compatible with the UK visitor rules.** There is no fixed limit on the number of visits. Border officials assess whether your travel pattern amounts to living in the UK, considering the length of each stay and your ties to your country of residence. Your studies and home in Paris would be relevant evidence. [Home Office visitor guidance, section 7.4](https://www.gov.uk/government/publications/visit-guidance/visit-caseworker-guidance-accessible--2)

For your proposed arrangement, I would keep these documents available when travelling:

- Proof of university enrolment and your class timetable.
- Your French residence permit or valid long-stay visa, plus evidence of your address in Paris.
- A return ticket for that weekend.
- Evidence that you can afford the trips, and your boyfriend’s address and contact details.

These are practical ways to support your explanation that you live and study in France and visit him briefly. The government’s [supporting-document guidance](https://www.gov.uk/government/publications/visitor-visa-guide-to-supporting-documents/guide-to-supporting-documents-visiting-the-uk) covers evidence of lawful residence, finances and circumstances outside the UK.

If questioned, explain the arrangement honestly: you study in Paris, visit your boyfriend on alternate weekends, and return for your classes. Based on the assessment criteria, that pattern supports a temporary-visit explanation, although **nobody can guarantee admission on every trip**.

Under current rules, Brazilian passport holders normally need an **electronic travel authorisation (ETA)** for short visits. An ETA permits travel and does not guarantee entry. Check this before booking. [ETA nationality list](https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-eta-national-list), [ETA guidance](https://www.gov.uk/eta)

Finally, being refused entry does **not automatically mean you can never return**. The reason for refusal matters; GOV.UK advises people previously refused entry to consider applying for a Standard Visitor visa. If that happens, obtain the written reasons and advice before another trip. [GOV.UK guidance](https://www.gov.uk/eta/what-you-can-cannot-do)