In real life, most of the people get bored, break trust, cheat on partners, and break hearts. It is very important to maintain a realistic balance in your love life.
You should not doubt your partner all the time, but if you notice a negative change in their actions or reactions, then try to have some surety about things will not do any worse.
However, your partner might be secretly sleeping around while professing undying love to you.
If you have had a shaky relationship lately and your partner is acting bizarrely, you have to keep an eye out for indications that they are cheating. Here are some of the signs that your partner is making love with someone else: