I realize im being an idiot
If you've never before been jealous, I wouldn't jump to that conclusion so quickly.
I have a different take from the other advice given here. That is - IF
you have never before felt jealousy around a partner - it may or may not
There are plenty of smooth men who 'never do anything wrong' who bed plenty of other women. Whether or not your partner is one of these types is for you to know.
I also have a suspicion that one of the reasons you are jealous is because you see reflections of the way he won your heart in the way he treats these other women....if so, then once again...you need to know whether this is the way he woo's women, or
if you just fell in love with him for this friendliness trait of his.
There is also the question of how the two of you met. Certain ways of meeting result in the creation of trust issues, and therefore jealousy issues - for example, if the two of you got together while he had another girlfriend (not matter what excuses the guy comes up with) - this action creates trust issues between most partners.
Also, there is an issue with either your self-esteem, or your view of life. Long term jealousy ALWAYS results is lower self esteem and frequent unhappiness. That you choose to stay in a relationship with someone who causes you extreme jealousy should tell you something. It is something that you should get to the bottom of, and work out :
1. Why you put up with him (because you love him is NOT the issue)
2. Why you think you can't do better (because he's the best is NOT the issue)
3. Why you blame yourself
4. Any other issues you find arising from your situation
Lastly - in relation to the above paragraph, you need to understand that you are responsible for all your own feelings and decisions. Other people can contribute to your feelings and decisions - and they can influence your feelings and decisions...but your feelings & decisions are yours.
So when you ask 'why do I put up with him' - the answer starts with 'I think deep down inside me...' or 'when XX does YY, I feel...' or 'what I want in a relationship is ZZ and he provides ZZ' ...etc. In all of those, you acknowledge responsibility for your life, for your feelings, for who you are, for what you do etc
Hope it helps.